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 Cam Neely Jersey . -- Cincinnati Reds closer Aroldis Chapman is undergoing surgery to repair a broken bone above his left eye but has no other serious injuries after being hit in the face by a line drive in a spring training game. Brad Marchand Jersey . - The Oakland Athletics say they are stopping negotiations to extend their lease at the Coliseum. http://www.cheapbruinsjerseys.info/authe...-bruins-jersey/. And I wanted to take this opportunity to share some of my experiences gained through International competition and the 1998 Winter Olympics in Nagano, Japan. Seven NHL referees and six linesmen will be assigned upcoming games in Sochi by the IIHF as part of their 28-man officiating roster comprised of 14 refs and 14 linesmen. David Pastrnak Jersey . The former world No. 1 Djokovic, who is the top seed here despite being ranked No. 2, snuck past 35-year-old Czech showman Radek Stepanek in four high- quality sets, 6-4, 6-3, 6-7 (5-7), 7-6 (7-5), on Centre Court. Djokovic appeared relieved when he converted on his first match point by swatting a cross-court forehand winner that just caught the line to end an affair that featured only two service breaks. Bobby Orr Jersey . Defensive end Jadeveon Clowney, the Houston Texans No. 1 pick in the draft, was on the field Tuesday for the first time with former NFL Defensive Player of the Year J.BUFFALO – Though he understood the need to protect goaltenders, Nazem Kadri said he was a little surprised to receive a three-game suspension for his collision with Wild goaltender Niklas Backstrom. "I didnt quite realize the length was going to be something like this," said Kadri from First Niagara Center in Buffalo on Friday morning. "I maybe thought a fine or a game or two [games] max." Kadri wont be eligible to return until Nov. 21 against Nashville, further hampering the Leafs situation at centre ice. Already forced to move James van Riemsdyk to the middle with Tyler Bozak and Dave Bolland both out, the suspension to Kadri could not come at a more precarious time. "Id have to say this is a new one," Randy Carlyle said with a nervous laugh ahead of a home-and-home set with the Sabres. "You have plan A, B, C and D in the drawer and I think were at E and F right now." Those plans will include 28-year-old Trevor Smith, who rejoined the Leafs from the Marlies following a game in Cleveland on Thursday night. Smith, the Marlies captain, has 12 points in seven AHL games, but had been plugged exclusively on a fourth line in previous stints with the club. "We cant expect Trevor Smith to come up at put him on our fourth line," said Carlyle. "Its unfair to him in this situation. When we had other people ahead of him, we had Bozak, we had Bolland, its a little bit different, but in tonights situation hes going to play a prominent role in an offensive line." Smith joins an unlikely group at centre that includes van Riemsdyk, Jay McClement and Jerred Smithson, who was just inked by the organization to an NHL contract last week. Among the leagues most potent groups at even-strength last season, the Leafs have struggled at times to generate offence this season. Over the ppast four games – three losses – theyve managed just one even-strength goal, a Joffrey Lupul marker in a 3-1 loss to Boston.ddddddddddddnbsp;Second on the team with 14 points, Kadris absence wont help to address the deficiency. "Thats really the most disappointing part is knowing that were short some guys and really I cant do anything to help, but just play the waiting game right now," Kadri said. Kadri had just deflected a shot on goal from Lupul early in the first period Wednesday night before he forcefully bumped a startled Backstrom with arms extended in the Minnesota crease. Later ejected for a thunderous neutral zone hit on Mikael Granlund, the 23-year-old called the collision with Backstrom accidental, but understood the NHLs recent mandate to increase protection for goaltenders. "I was just trying to go to the net hard to make a play and just ran out of real estate and accidentally bumped into him," said Kadri, who had a hearing with NHL Senior VP of player safety Brendan Shanahan on Thursday afternoon. It was here in Buffalo that an increased mandate for such protection started. Sabres goaltender Ryan Miller was bowled over by Bruins forward Milan Lucic in 2011, leading NHL general managers to request that Shanahan take further action. "I think the temperature of that has changed over the last two years," said Carlyle, acknowledging the role of general managers and ownership around the league. Backstrom was concussed as a result of the incident with Kadri, driving the decision toward a three-game sit-down. "Its definitely understandable," said Kadri, professing hope that Backstrom was okay. "I know theyve kind of cracked down on the interference with the goaltenders and players [have] got to be aware of their surroundings now. That being said, it was unintentional." 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