Top seed John Isner was ousted from the ATP Citi Open in Washington DC on Friday, paying the price for squandering leads in two tie-breakers. Isner unleashed a 29-ace barrage at US fifth seed Steve Johnson, but failed to capitalise on five set points in the first set and seven in the second in falling 7-6 (9-7) 7-6 (17-15).Those were very easily tie-breakers I could have won but I didnt, said Isner. I had countless chances. I did a lot of really great things. I put more pressure on him than he did on me. It didnt pay off. Isner made his first double fault on the penultimate point, then smacked a forehand wide to hand Johnson the victory after an hour and 57 minutes, the last 23 minutes of it in the tension-packed tie-breaker.I shot myself in the foot in the second set, he said. A double fault in the penultimate point sent Isner on his way to being knocked out Johnson fired 22 aces of his own, denied Isner on six break points and took his second win in six meetings with Isner.He was serving extremely well, Johnson said. I didnt have any break points. I was able to scrap out the first set. I got very lucky when he double faulted at the end and I was able to close it out. Johnson could be the first native to win in Washington since 2007 Johnson, ranked a career-high 25th, next faces another serve smasher in 37-year-old Croatian Ivo Karlovic, who blasted 26 aces to dispatch US sixth seed Jack Sock 7-6 (7-4) 7-6 (8-6).French second seed Gael Monfils avoided the upset bug by downing US eighth seed Sam Querrey 6-4 3-6 6-1. Gael Monfils is the highest-ranked player left in the mens tournament German Alexander Zverev awaits him in the semi-final after he eliminated French fourth seed Benoit Paire 6-1 6-3.I like him. Its going to be a big match, said Monfils, who is 2-0 against Zverev, including a February quarter-final win at Rotterdam.Zverev, ranked 27th, is the youngest player in the top 30 since Rafael Nadal in 2005 while Monfils is seeking to win his sixth career title. WATCH: Tennis duo risk arrest Bernard Tomic and Viktor Troicki had a run in with a policeman Watch the ATP Citi Open semi-finals live on Sky Sports 3 HD on Saturday from 7pm.Check out daily Tennis news on skysports.com/tennis, our app for mobile devices and iPad and our Twitter account @skysportstennis.By purchasing a Sky Sports Day Pass for £6.99 or Sky Sports Week Pass for £10.99, you can enjoy access to all seven Sky Sports channels and watch on a TV with a NOW TV Box or on a range of devices. Also See: ATP schedule Tennis on Sky Latest scores Get a NOW TV pass Video NMD Scontate Outlet . Mitchell first announced on Twitter that he has signed with the Steelers and his agent Brian Hamilton confirmed the signing to The Associated Press. Financial terms were not released. The Steelers have not announced the addition of Mitchell. Adidas NMD Italia . Which is to say, the top of this years draft class is not as dynamic or exciting as the 2013 class of Nate MacKinnon, Sasha Barkov, Jonathan Drouin and Seth Jones and its not as strikingly promising as the highly-anticipated 2015 slate of Connor McDavid, Jack Eichel and Noah Hanifin. http://www.adidasnmditalia.it/ . Notes on P.K. Subban, Dale Weise, Erik Haula, Mikael Granlund, Ilya Bryzgalov and more. Adidas NMD Online Italia .ca! Hi Kerry, The recent issues in the Boston-Pittsburgh game have highlighted a number of officiating, game control, and player sportsmanship aspects. Adidas NMD Scontate . Top-seeded Djokovic, who is making only his second appearance this year after reaching the quarterfinals of the Australian Open, was a 6-3, 6-3 winner over 54th-ranked Istomin of Uzbekistan. "It wasnt as easy as the scoreline indicates," said Djokovic, who has won in Dubai on four occasions.TORONTO -- Wimbledon champion Novak Djokovic of Serbia, finalist Roger Federer of Switzerland and Canadian star Milos Raonic headline this years official player entry list for next months Rogers Cup. The top 44 players on the ATP World Tour rankings list have committed to playing at the Aug. 2-10 event at Rexall Centre, Tennis Canada said Monday in a release. "With one of the greatest player fields on the ATP World Tour combined with our new art of tennis theme and the exciting enhancements weve made throughout the grounds, we know this is going to be one of our best tournaments ever," said tournament director Karl Hale. "All of the top players are looking forward to returning to Toronto this year, and they will undoubtedly provide world-class action every day." Raonic, from Thornhill, Ont., rose to No. 6 in the latest rankings after reaching the semifinals at the All England Club last week. Raonic lost in straight sets to Federer, who went on to drop a five-set decision to Djokovic in the final.dddddddddddd "Im really looking forward to coming back to Toronto and playing Rogers Cup in my hometown," Raonic said. "There are only a few opportunities in a year that I get to play at home in front of Canadian fans and Im eager to do well again this year. "I always feel comfortable here as this is where I grew up and this is one of the best places in the world to play." Defending champion Rafael Nadal of Spain, who beat Raonic in last years final at Montreal, is also in the field. In addition, Vancouvers Vasek Pospisil has earned direct entry into the tournament a year after making it into the semifinals as a wild card. The 56-player draw will be completed at a later date with the addition of qualifiers, wild cards, and special exemptions. The Rogers Cup womens tournament will be held Aug. 1-10 at Montreals Uniprix Stadium. Wholesale HoodiesNFL Shirts OutletJerseys NFL WholesaleCheap NFL Jerseys Free ShippingWholesale Jerseys CheapCheap NFL Jerseys ChinaWholesale JerseysWholesale NFL JerseysCheap NFL Jerseys ChinaCheap NFL Jerseys ' ' '