Feliciano Lopez moved into the Dubai Championships semi-finals after Novak Djokovic was forced to withdraw from their quarter-final. A below-par Djokovic informed the umpire of his decision after Lopez took the opening set 6-3 - but the world No 1 was clearly struggling with an eye condition and could not continue.Lopez broke in the opening game of the match and Djokovic was forced to see the trainer after three games. Lopez held onto his advantage before a second break in the ninth game gave the Spaniard the first set, before Djokovics dramatic exit. The Serb, a four-time champion in Dubai, had recorded the 700th win of his career earlier in the week but having chalked up 14 victories already this season, he was forced to pull out of the event.Lopez is through to face Cyprus Marcos Baghdatis, who was a surprise 7-5 6-0 winner over Spanish fourth seed Roberto Bautista Agut earlier in the day.Earlier, Stan Wawrinka moved into a highly-anticipated semi-final against Nick Kyrgios with a comfortable 7-5 6-1 victory over Philipp Kohlschreiber.The clash between Wawrinka and Kyrgios on Friday will be the first contest between the pair since their infamous match in Montreal last August. Stan Wawrinka is through to a semi-final with Nick Kyrgios Against Kohlschreiber, Wawrinkas three breaks proved enough to edge a topsy-turvy opening set that saw five dropped service games. The Swiss ace and second seed flew into a 2-0 lead, only for Kohlschreiber to bounce back with the next two before Wawrinka re-established his two-game lead to seize the initiative.However, his German opponent fought back again to level matters before Wawrinkas crucial break in the 12th game of the match saw him clinch the opening set.A more straightforward second set saw Wawrinka take control with his backhand beginning to find its range and he opened up a 4-1 advantage before a further break gave him a four-game cushion, which he rubber-stamped by winning five successive points from 0-40 down to hold serve and wrap up the match.You can follow all the action from the Dubai Championships semi-finals on Friday, live on Sky Sports 3 from 1pm on Friday. Dubai Championships - Semi-Finals Feliciano Lopez v Marcos Baghdatis Nick Kyrgios v Stan Wawrinka Also See: Kyrgios sees off Berdych Ferrer falls in Acapulco ATP schedule Tennis on Sky Stitched Diamondbacks Jerseys .C. -- Glenn Howard needed an extra end to move into the Masters Grand Slam of Curling final. Fake Diamondbacks Jerseys . Fred Couples, captain of the U.S. side, put it all into perspective. "We know whos in charge," he said. https://www.cheapdiamondbacksjerseys.us/ . -- For the first time in two months, an opponent was standing up to Alabama. Diamondbacks Jerseys China . -- Lou Brocks shoulder-to-shoulder collision with Bill Freehan during the 1968 World Series and Pete Roses bruising hit on Ray Fosse in the 1970 All-Star game could become relics of baseball history, like the dead-ball era. Arizona Diamondbacks Gear . Breaking three of his own world records on his way to winning in Paris, Chan silenced the critics and left the audiences standing in appreciation and awe.LONDON -- For almost 27 years, Old Trafford has witnessed Alex Ferguson venting his anger from the dugout, berating officials, anxiously checking his watch and making celebratory jigs down the touchline. On Sunday, 76,000 fans have one final chance to witness -- and savour -- the most successful manager in British football history taking charge of Manchester United on home soil. With the title wrapped up, the Swansea match is effectively meaningless, but the United players will want to give their retiring manager a suitable send-off from Old Trafford. And for the 13th and final time, the Premier League trophy will be presented to the 71-year-old Ferguson now that black, red and white ribbons have replaced the blue and white of Manchester City. "It could be a bit emotional with it being his last game at Old Trafford and all the kids and everything there," Fergusons son, Darren, said in a video interview with the magazine Twentyfour7 Football. "No one will ever replace him -- it should be a good day for the family on Sunday but hes ready to go." Ferguson is yet to explain why he has decided to bring an end to a United career that has yielded almost 50 trophies since 1986. But former England coach Fabio Capello offered an insight on Friday following a phone call with Ferguson. "A few months ago he told me that he was going to stay on," Capello told broadcaster Sky Italia. "The news of his retirement really surprised me. I called him and he told me that he decided this way because of excess stress. ... He told me that now hell go and travel a bit, have fun and see the world with his wife." Darren Ferguson, however, rejected the theory his dad retired because of health issues. "Theres nothing wrong with his health, contrary to what some people are saying," said Darren, manager of Peterborough United.dddddddddddd"Hes got to have a small hip operation but its no different to most 70-year-olds ... he feels like hes going out at the right time, hes left the club in a fantastic position, very healthy." It was his wife Cathy who persuaded Ferguson to reverse previous retirement plans for the end of the 2001-02 season, ensuring he went on to establish himself as the most successful manager Britain has produced. That Ferguson is leaving on his own terms from Old Trafford would have seemed unthinkable during his early days with United when it took him four years to win his first trophy -- the FA Cup -- and another three to land the Premier League. "He was the greatest coach of all time, especially because of all the difficulties he overcame at the start of his career with Manchester and for remaining for so many years on the same bench," Capello said. "Its really incredible. I normally think that after four-five years at the most a coach should move, so to think that he stayed on the same bench for 26 years is incredible. "That takes psychological, technical and humane capacity. I had a special relationship with him." Ferguson is being replaced by a manager in his own mould -- fellow Glasgow native David Moyes, who is leaving Everton after 11 years at the end of the season. "I dont think anybody thought the day would come when Sir Alex Ferguson retired," Moyes said. "We all thought he was superhuman. He is an example to anyone in their 70s. "The respect for him within the game is beyond any words I can use." ' ' '