KEY BISCAYNE, Fla. -- Novak Djokovic benefited from an erroneous call and claimed he didnt realize he had broken the rules. When Andy Murray walked to the net and challenged him about it, Djokovic responded with a shrug and a sheepish smile. Murray lost the dispute, and the match. The pivotal ruling against the defending champion helped Djokovic win 7-5, 6-3 in the quarter-finals of the Sony Open. Roger Federer was up a service break twice in the second set but lost to No. 20-seeded Kei Nishikori 3-6, 7-5, 6-4. Nishikori will play Djokovic on Friday. The point that aggravated Murray occurred at the start of the 12th game, when he was serving at 5-6. Djokovic charged forward to volley a short ball and hit it for a winner. Murray argued -- and TV replays confirmed -- he should have been awarded the point because Djokovics racket was on the far side of the net when he hit the ball. Chair umpire Damian Steiner declined to change his call, and such rulings cant be appealed for video review. Murray briefly discussed the matter with Djokovic. "I went and asked Novak, and he told me he was over the net," Murray said. "Look, it might be my mistake," Djokovic said. "I think I crossed the net with the racket. I didnt touch the net. Maybe the rule is that you are not allowed to pass on his side with the racket. Im not sure. You tell me." That is indeed the rule. Djokovic said that if he had understood it correctly, he would have conceded the point. A flustered Murray committed unforced backhand errors on the next three points to lose the game and the set. "Obviously, that distracted him mentally, and after that he gave the set away," Djokovic said. Murray took a lead in the second set but lost the final four games and the last 12 points. Afterward, he downplayed the bad call. "Im not angry," he said. "It maybe had a slight bearing on that game, but I was still up a break in the second set." Nishikori will be playing in only his second ATP Masters 1000 semifinal, and his first in 2 1/2 years. "I thought I really played well, especially in the third set," Nishikori said. "I was hitting balls deep and striking well. Everything was going well." Federer was the runner-up to Djokovic at Indian Wells two weeks ago, and said hes pleased with his start to the year despite the latest loss. "I just couldnt find my rhythm on the serve today, which was surprising," Federer said. "Its a bit frustrating, but Kei did well to stay with me. He was more consistent in the second and third, and in the end its to his credit." Li Na became the first Chinese woman to reach the Key Biscayne semifinals when she beat Caroline Wozniacki 7-5, 7-5. Lis opponent Thursday night will be Dominika Cibulkova, who erased three match points in the second set -- one when a call was overturned via replay -- and beat Agnieszka Radwanska 3-6, 7-6 (5), 6-3. Six-time champion Serena Williams will play five-time runner-up Maria Sharapova in the other womens semifinal. Williams has beaten Sharapova 14 consecutive times. Murray won the Key Biscayne title in 2009 and 2013 but wasnt at his best against Djokovic. The Scotsman committed five double-faults and 32 unforced errors, including a flurry down the stretch. He took a 3-2 lead in the second set with his only service break, then double-faulted twice to give it right back. But it all might have been different if not for the call that made one point stand out from the other 125. Djokovic had won praise for his sportsmanship when he conceded a point following an erroneous call in his match Tuesday, but against good friend Murray, he left the verdict to the umpire. A sideline reporter told Murray that TV replays showed he was correct about the call, and during the ensuing changeover he questioned Steiner. "His racket was over the net," Murray said. "Its quite clear. You can see it on the replay." "I have to make a decision at the moment," Steiner replied. Any hard feelings on Murrays part didnt carry over after the match, when he shook hands with Djokovic and Steiner. "Its a hard one for the umpire to call," Murray said. "Just frustrating." And Djokovic said the call was the umpires to make. "Its not my fault," he said. "I mean, I was never lying on the court. I always try to be fair to whoever I play against." Wholesale Air Max 720 NZ . Next up is another showdown with Michigan. Payne scored 18 points, Branden Dawson had 14 and No. 22 Michigan State beat No. 12 Wisconsin 83-75 on Saturday to reach the Big Ten tournament championship. Air Max 720 Wholesale Cheap . The mixed zone is not a place to make friends. http://www.cheapairmax720nz.com/ . Mike Vecchione tied it at 2 with 4:01 left in the first, Saskatoon native Eli Lichtenwald gave the Dutchman the lead 57 seconds later, and Daniel Ciampini capped the spree with 2:57 to go. Air Max 720 NZ Online . -- Claudio Bieler hadnt scored since early September, and not from the run of play since mid-July. Air Max 720 For Sale . The two-time former Formula One champion downplayed his third-place finish three weeks ago in China and said progress is going slow for Ferrari as it tries to make up ground on Mercedes.With the NHL regular season right around the corner, TSN.ca profiles each team leading up to puck drop. Next up are the Columbus Blue Jackets, who are trying improve on last seasons playoff campaign - provided they can get their No. 1 centre signed to a contract. Catch up on their summer moves and the issues they face this season, as well as Craig Buttons analysis of their top prospect and an analytical breakdown by TSNs Scott Cullen. Division: Metropolitan GM: Jarmo Kekalainen Head Coach: Todd Richards 2013-14: 43-32-7 (4th in Metropolitan) Playoffs: Lost in First Round Goals For: 226 (12th) Goals Against: 214 (13th) PP: 19.3% (11th) PK: 82.1% (14th) That Was Then: Last season was the most storied in the teams 16-year history. That seems like lofty praise for a first-round exit, but the Blue Jackets fought hard and got a consistent effort throughout their line-up to earn a playoff spot in the post-season. Things started ugly as the Jackets lost 10 of their first 15 games, including a pair of five-game losing streaks. Matters didnt get much better when Sergei Bobrovsky went down in early December with a groin injury. The team sweated out some wins under Curtis McElhinney and Mike McKenna and put the pedal down upon Bobrovskys return. They won eight in a row from Jan. 6 to Jan. 23 and thrust themselves into the Eastern Conference playoff race, earning the Eastern Conferences first wild card spot. Though outmatched on paper, the plucky Blue Jackets pulled out a pair of dramatic overtime wins against Sidney Crosby and the Penguins in Games 2 and 4. They almost forced a Game 7, but the clock ran out on the season despite a three-goal outburst in the third period of an eventual 4-3 Game 6 loss. The Jackets saluted their rapturous fans from the ice but, more importantly, may have served notice to the league that theyre for real. In just his third NHL season, 21-year-old Ryan Johansen found his stride. He emerged as the No. 1 centre the Jackets had been waiting for and piled in 33 goals without missing a single game. How that plays out this season remains to be seen. Scott Cullens Analytics Avalanche 2013-14 Stats by Quarter Games GPG GAA SH% SV% SAF% PTS% 1-20 2.45 2.75 6.7% .931 48.4% .425 21-41 2.81 2.86 10.7% .912 48.8% .548 42-62 3.29 2.52 9.7% .928 52.4% .690 63-82 2.10 2.25 5.3% .936 52.1% .571 NHL AVG 2.67 2.67 7.8 .922 50.0% .562 Key: GPG= goals per game, GAA= goals-against per game, SH%= even-strength shooting percentage, SV%= even-strength save percentage, SAF%= score-adjusted Fenwick percentage (differential of shot attempts faced vs. shot attempts, excluding blocked shots, adjusted for game score), PTS%= percentage of available points. Analysis: Games 1-20: Strong goaltending wasnt enough to overcome subpar possession and shooting. Games 21-41: Goaltending dipped, but shooting skyrocketed, making them more competitive. Games 42-62: Best stretch of the season, with vastly improved possession combined with high percentages. Games 63-82: Scoring dried up, but goaltending and possession were strong enough to keep Blue Jackets in playoff picture. Key 2014 Additions: LW Jerry DAmigo, C Brian Gibbons, LW Scott Hartnell Key 2014 Subtractions: LW Blake Comeau, RW Matt Frattin, C Derek MacKenzie, G Mike McKenna, D Nick Schultz, RW Jack Skille, LW R.J. Umberger This Is Now: Building onn last seasons success is no easy task for the Jackets.dddddddddddd A full year out of Bobrovsky is also key. He shone in the lockout-shortened 2012-13 season and was a spark-plug for the team upon his return last year. His save percentage prior to injury was .909, but he posted a .931 mark to finish the season. The rest is up to the development of their young core and scoring depth. Johansen had his breakout year, but second in team scoring was defenceman James Wisniewski with 51 points. The addition of Scott Hartnell from the Philadelphia Flyers is a huge character boost for a team that already has a lot of that, but questions beg about his on-ice performance. He brings grit and is always good for 100 penalty minutes, but have the Jackets acquired the 20-goal player from last season or was Hartnells scoring talent buried by the Flyers depth last year? He scored 37 in 2011-12, but at 32 years-old, expecting him to do it again may be unrealistic. Hartnell does, however, provide leadership and a positive influence for the teams young forwards. Johansen, Boone Jenner, Cam Atkinson, Artem Anisimov, Nick Foligno and Brandon Dubinsky are all still in their twenties and could learn a lot from him. DEPTH CHART Forwards Left Wing Centre Right Wing Boone Jenner Ryan Johansen Nathan Horton Scott Hartnell Brandon Dubinsky Cam Atkinson Nick Foligno Artem Anisimov Matt Calvert Jerry DAmigo Mark Letestu Corey Tropp Michael Chaput Brian Gibbons Jared Boll Kerby Rychel Alexander Wennberg Simon Hjalmarsson Defence Left Right Ryan Murray James Wisniewski Fedor Tyutin Jack Johnson Tim Erixon David Savard Frederic St. Denis Dalton Prout Will Weber Cody Goloubef Goaltenders Sergei Bobrovsky Curtis McElhinney Oscar Dansk Craigs List TSN Director of Scouting Craig Buttons Top Prospect: Alexander Wennberg Alexander Wennberg is so fluid in his play. Excellent skater with the ability to move past defenders seemingly with ease. Can make plays with the puck at high speed and in tight areas. What should allow Alexander to be a top center is an outstanding sense of the game, offensively and defensively. He adapts to the situation and then takes advantage. Centre ice is a critical position in the NHL and a duo of Alexander and Ryan Johansen puts the Blue Jackets in a position for success. Fantasy - Cullens Player to Watch - Boone Jenner A physical forward with good size, Jenner earned a more prominent role late in his rookie season, scoring 15 points in his last 27 games (then five points in six playoff games), finishing the year on Ryan Johansens wing. Jenner is still young, only 21-years-old heading into his second season, and it could be too soon to forecast an offensive breakthrough, but if Johansen gets signed and there is an opportunity to build on the foundation they were laying last season, then Jenner should continue to play a prominent role in the Blue Jackets attack. 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