KEY BISCAYNE, Fla. Cheap Ecco Shoes Australia . -- 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." Cheap Ecco Shoes Online . The Arena das Dunas in the northeastern city of Natal sustained minor damage during the protests, but demonstrators stayed away on Sunday and officials said the stadium passed its first test, with only minor adjustments needed going forward. Ecco Shoes Clearance Australia .Y. - Terry and Kim Pegula have no immediate plans to tinker with their new NFL team. http://www.cheapeccoaustralia.com/ . The rest of the team was already on the field stretching before batting practice while Puig was getting dressed in the clubhouse. He had been slated to start in right field for the afternoon game against the San Francisco Giants, who beat the Dodgers 8-4.Scott Brown believes the appointment of Brendan Rodgers will spark an influx of big-name players at Celtic. And Brown revealed that Fridays announcement by the club, which named Rodgers as the Glasgow sides next manager, was met with unanimous delight by the rest of his team-mates.The Hoops skipper told his clubs website: I was down in London when I heard and its great news. Celtic chairman Ian Bankier admits they raised their budget to get Rodgers The lads are in a group chat and we speak quite a lot and we are all delighted with Brendan coming in. It will be a fresh start for everyone and everyone will have to prove their worth.Its definitely exciting. The players he will attract himself will be huge and everyone seemed to love his coaching at Liverpool and Swansea.He has done really well with his previous clubs, almost winning the league at Liverpool, and he has Champions League experience too. He has done really well with his previous clubs and he has Champions League experience too Scott Brown on Celtics new boss Hopefully he comes here and we can continue to win leaguues and cups, and get into the Champions League. Ecco Shoes Australia Wholesale. People say we cant afford the top players nowadays but we have just gone and got a top manager.He knows about the club which will help as he will understand what coming to a huge club with a big reputation is all about, he added. Andy Walker said Rodgers becoming the new manager of Celtic is a huge boost for the club and for Scottish football One of the reasons I came to Celtic was the fact there was a huge manager in charge who had done well down in England in Gordon Strachan.And now we have another huge manager who had done well down south, and he will bring that enthusiasm and experience along with his style of play.Everyone knows that Celtic is a high pressure job and all the other things that come with it but he will know what thats all about, having worked in a similar situation in Liverpool with that local rivalry with Everton, so that will be important for him.Celtic will introduce Brendan Rodgers at a press conference at Celtic Park on Monday, May 23. Follow all the latest updates on Sky Sports News HQ. Also See: Rodgers to-do list Nicholas: Exciting appointment Walker: Its a huge boost Lambert: Rodgers fit for Celtic ' ' '