MEMPHIS, Tenn. -- Defending champion Kei Nishikori of Japan beat Benjamin Becker of Germany 6-4, 6-4 on Wednesday night in the U.S. National Indoor Tennis Championships. Nishikori, who won his third career title at The Racquet Club last year, will play Russian Alex Bogomolov Jr. in the quarterfinals Friday. Bogomolov beat American Ryan Harrison 6-3, 2-6, 6-2 earlier Wednesday. The defending champ started slowly as he struggled a bit with his serve. Nishikori, who didnt drop a set here winning this tournament a year ago, jumped out to a 3-1 lead only to be broken twice. Nishikori broke Becker to open the match and again after the German broke him for a second time to tie the set at 4-4. "You see the score it looks simple like easy," Nishikori said. "But with so many breaks and I was serving all right but a couple moments I wasnt feeling the ball and the ball was going everywhere. So I led in unforced errors I guess today. First match and never easy of course against Becker, but Im happy to win two sets today." American Jack Sock beat Jiri Vesely of the Czech Republic 6-2, 6-1. Sock needed 68 minutes to top Vesely overcoming six double-faults on his way to his second quarterfinal this year. Michael Russell downed fellow American Tim Smyczek 6-2, 7-6 (5) and will play third-seeded Lleyton Hewitt of Australia or Marcos Baghdatis of Cyprus. Qualifier Denis Kudla beat fellow American Donald Young 6-1 6-1 in a first-round match needing only an hour to get a little payback for losing to Young here last year. Nishikori, ranked as high as No. 11 last June, is trying to successfully defend a title for the first time in his career. He also is playing as the top seed at an ATP Tour event for the first time this week. "Its a weird feeling actually," Nishikori said about being the No. 1 seed. "Especially I was playing without seed and now Im top 20. And yeah, I didnt really feel like first seed. I didnt really care much, but its a ... pleasure to be No. 1 seed." He started well enough breaking Becker to jump out to a 3-1 lead. Then he struggled as Becker broke him twice. Nishikori broke Beckers serve for the third time in going up 5-4 and served out for the set. He won all three break points on Beckers serve. The German had seven break points on Nishikori and converted only twice in the opening set. In the second set, Nishikori was much more in control. He jumped out to a 4-2 lead and was up 4-3 when Becker broke his serve. Nishikori broke right back and served out for the match and a win he was happy to take. Nishikori said his serve was much better in the second, though he wasnt happy with being broken. "I was up 4-3. Thats an important game," Nishikori said. "I should finish well, but second set much better." Air Max 720 Release Date . 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When the next inning rolled around Wednesday, though, Nationals manager Matt Williams sent Strasburg to the mound to face the top of the Dodgers order in what would become a 3-2 victory for Washington, the first time this season the No.MIAMI - Jhonny Peralta is relieved that his long absence is over. Peralta played in his first game since completing a 50-game suspension, and had a hit and an RBI in the Detroit Tigers 3-2 loss to the Miami Marlins on Friday night. "I felt pretty good," Peralta said. "I saw the ball well, the breaking ball and everything. I made good contact." Peralta, who was suspended as a result of Major League baseballs investigation into Biogenesis, the Florida anti-aging clinic accused of distributing performance-enhancing drugs, started in left field. He had his first chance on Giancarlo Stantons bases-loaded double in the third inning that gave Miami a 3-0 lead. The Marlins loaded the bases on Koyle Hills leadoff single and consecutive two-out walks to Placido Polanco and Christian Yelich. "I played deep to him, close to the wall," said Peralta, a career infielder trying a new position in an effort to earn a spot on Detroits post-season roster. "Thats what they told me to do. He hit it perfect, close to the line. There was nothing I could do." Peraltas run-scoring double chased Miami starter Tom Koehler in the sixth and cut the Marlins lead to 3-2. "He was slow getting to the ball by Stanton," Tigers manager Jim Leyland said of Peralta. "But overall he did fine — first time out there in a big league game." The loss guaranteed AL Central champion Detroit will open the division series on the road. Oakland beat Seattle and holds a two-game lead over the Tigers for home-field advantage with two to play. The Athletics hold the tiebreaker, having won the season series 4-3. "You cant win a division title if you cant win on the road," Leyland said. "Ive always been proud to take my team on the road. I think sometimes — to be honest — the pressure is on the home team more." Stanton drove in three runs for the Marlins and Koehleer (5-10) pitched 5 1-3 innings, allowing two runs and five hits while walking three and striking out three.dddddddddddd "We had some great at-bats, were patient," Miami manager Mike Redmond said. "(Stanton) was fortunate enough to come up with the bases loaded and hit it down the line." Ryan Webb relieved Koehler and pitched 1 2-3 scoreless innings and Chad Qualls followed with a perfect eighth. Steve Cishek pitched a scoreless ninth for his 29th consecutive save and 34th in 36 opportunities. "It was a great way to go out," said Koehler, who battled a stomach virus before the game. "Ive been real pleased the way Ive been throwing the ball the last couple of outings. I only feel the experience Ive had here is going to help me in the future." The Tigers scored their first run on Austin Jacksons run-scoring single in the fifth. Koehler struck out Andy Dirks to end the Tigers threat. Detroits Jose Alvarez (1-5) lasted 2 2-3 innings in his return to the starting rotation after eight relief appearances. He allowed three runs and two hits, walking two and striking out three in his first start since Aug. 16. Earlier Friday, the Marlins fired Larry Beinfest, the teams president of baseball operations. Beinfest had overseen player personnel for the Marlins since 2002. NOTES: Former Marlin Miguel Cabrera received a warm ovation before his first at-bat in the first inning and after he was removed for a pinch runner following his leadoff single in the sixth. Cabrera, who went 2 for 3, played with the Marlins the first five seasons of his career before being traded to Detroit in 2008. ... 1B Prince Fielder was replaced by Don Kelly after he walked to lead off the second. ... 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