LONDON -- Novak Djokovic is playing for a lot more than just a record-tying sixth title at the ATP finals.The second-ranked Serb is also looking to reclaim the No. 1 ranking.Djokovic won his third straight match at the season-ending tournament on Thursday, beating David Goffin 6-1, 6-2 at the O2 Arena to finish group play undefeated for the fourth time in the past five years.But there are some more matches to play before the 12-time Grand Slam champion can be assured of finishing another season as the top-ranked player.Everything has been going ... in a positive direction. Ive been playing better and better as I proceed in the tournament, Djokovic said.Andy Murray took over the No. 1 ranking from Djokovic this month at the Paris Masters. But if Djokovic does better than Murray this weekend at the ATP finals, he will jump back ahead and finish the season on top for the third straight season and the fifth time in six years.Thats something you wish for, to have everything in your hands, not to depend on other players, Djokovic said. In this particular case, Im glad its like that.Murray, meanwhile, is looking to extend his stay at the top through the offseason for the first time. He plays his third group match on Friday against U.S. Open champion Stan Wawrinka.Djokovic had already qualified for the semifinals after winning his opening two matches at the O2. The second semifinal spot from the group went to Milos Raonic, who beat Dominic Thiem 7-6 (5), 6-3.Raonic, who reached the Wimbledon final this year but lost to Murray, ended up with 13 aces and 31 winners against Goffin.I stepped up when I had an opportunity in the tiebreak. I stepped up at the beginning of the second set and the end of it, Raonic said. Theres a lot definitely to be proud of, playing under that kind of pressure.Raonic also said he got some tips this week from John McEnroe, who worked with the Canadian during the grass-court season.He shares a lot of wisdom with me, a lot of his opinions. I respect that, Raonic said. It was a big plus to have him there.Goffin was making his debut at the tournament on Thursday, filling in for the injured Gael Monfils.The 11th-ranked Belgian didnt get much chance against Djokovic, earning only one break point -- and that in the final game of the match. Djokovic, meanwhile, converted four of his six break points, two in each set.It was not easy, said Goffin, an alternate who found out on Wednesday he would be facing Djokovic. I didnt feel really well. I didnt feel the rhythm. My groundstrokes, my best weapons, were not there. Its not easy against Novak when its like that.Djokovic is a five-time champion at the eight-man finals. He has won 21 of his last 22 matches at the O2 since 2012, including four straight titles.He also won the title in 2008, when the tournament was in Shanghai, so another victory on Sunday will put him even with Roger Federer as six-time champions.Djokovic opened the match against Goffin with two double-faults, but he didnt do much wrong after that. He ended up winning 83 percent of the points on his first serve, even with four double-faults in the first set.Another match won, but more work ahead.I always try to really take the last drop of energy, whatever is left in my body, to perform as well as I can, Djokovic said, and finish off the season in the best possible way. Cheap Custom Basketball Jerseys Sale . The Islanders dealt Thomas Vanek to the Montreal Canadiens after less than a year on Long Island. Meanwhile, the Oilers dealt long-time sniper Ales hemsky to the Ottawa Senators on Wednesday for a fifth-round pick in 2014 and a third-rounder in 2015. 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SEATTLE -- It took five pitches for the Houston Astros to continue the roll they were on before the All-Star break.George Springer hit a leadoff home run, Carlos Correa had a two-out, two-run double then scored from second base on a wild pitch during Houstons five-run fifth inning, and the Astros opened the second half with a 7-3 victory over the Seattle Mariners on Friday night.The four days off around the All-Star Game didnt slow the surging Astros. Houston won for the sixth time in eight games and its fifth straight win over the Mariners.Were not depending on one or two players, All-Star second baseman Jose Altuve said. Everybody here is doing something for the team and that is why were doing so good.Springer got the Astros started, but it was Correa who flashed all of his talents. His hitting skill in the fifth inning made Seattle pay for intentionally walking Altuve as Correa missed a home run by just a few feet with a double off the wall. Moments later, Correa flashed his speed by scoring from second base when James Paxtons third wild pitch of the inning ricocheted off catcher Chris Iannetta and over to the third base dugout.And Correa flashed his glove in the seventh inning reaching back across his body to snag Robinson Canos hot shot and throw him out at first.It started moving late so I was going one way, the ball was going the other, Correa said. I put out my glove and I caught it. I think it was a pretty good play.While Correa and Springer had the big hits, the Astros rally in the fifth started with consecutive doubles by Evan Gattis and Jake Marisnick. Springer scored on the second of Paxtons wild pitches and Correa missed a three-run homer by just a few feet doubling off the wall in left-center field.We showed our athleticism pretty well that inning with Springer scoring on the wild pitch and Correa scoring from second, Houston manager A.J. Hinch said. It was a really big inning for us. We didnt maximize our oppportunities early but it was nice to get a big inning.ddddddddddddThe Astros big inning offset a shaky performance from starter Doug Fister, who struggled to get through five innings. Fister (9-6) retired 12 of the first 14 batters, but gave back three runs after being staked to a 6-0 lead, two scoring on Shawn OMalleys double in the fifth. After walking Seth Smith, Fister broke Canos bat on a weak grounder back to the mound and escaped the inning.We put three up there and had a couple guys on for (Canos) at-bat. Couple slow curveballs and they got him out front there, Seattle manager Scott Servais said. Thats what Fister does. He keeps you off balance. His stuff isnt going to overpower you, but hes smart and knows how to pitch and changes speeds well.Houstons bullpen was nearly perfect the rest of the way throwing four shutout innings.LONG BALLSpringers leadoff homer was his 20th home run of the season and Marwin Gonzalez added a solo shot in the seventh inning. Springers home run was his seventh career long ball in 18 games at Safeco Field, and the 20 homers matched the career-high he set in 2014.TRAINERS ROOM:Astros: OF Colby Rasmus wasnt in the starting lineup on Friday, but Hinch said Rasmus is fully healthy after missing the final four games before the All-Star break due to an ear infection.Mariners: RHP Felix Hernandez made his second rehab start in the minors. Pitching for Triple-A Tacoma, Hernandez threw 5 2/3 innings, giving up one run and five hits. He is slated to start for Seattle on July 20 against the White Sox.UP NEXTAstros: Lance McCullers (4-3) looks to rebound after his shortest outing of the season in his last start. McCullers lasted just four innings last week against Oakland.Mariners: Hisashi Iwakuma (9-6) goes for his 10th win. Iwakuma has gone 8-2 over his past 10 starts. ' ' '