Andy Murray improved his chances of making the semi-finals of the ATP World Tour Finals for the first time in four years after a record-breaking contest against Kei Nishikori in London. Not since his debut in 2008, when the tournament was held in Shanghai, has the Scot won both of his opening two matches and his 6-7 (9-11) 6-4 6-4 victory over Nishikori will be enough for a first last-four appearance since 2012 as long as he beats Stan Wawrinka on Friday. Six months half price Upgrade to Sky Sports to watch Man Utd v Arsenal on Saturday and get the first six months half price This was the fourth meeting of the year between the pair, with Murray having won easily at the Olympics but enduring long five-set tussles with Nishikori in the Davis Cup and at the US Open, where he came out second best. And the Briton rose to the occasion once again, after his victory over Cilic, to defeat Japans finest in the longest ever match at the season-ending tournament, lasting three hours and 20 minutes.Shot of the matchMurray showed remarkable powers of recovery with a moment of pure genius to be in the right place at the right time to save a third set point in an opening set tiebreak with this attacking winner from the tightest of angles. It was reminiscent of his winning effort to win the Rome Masters earlier this year against Novak Djokovic. This was just about the best point in a dramatic tiebreak in which Murray had three set points and Nishikori had five Expert analysisSky Sports Peter Fleming: Hes the world No 1 and you dont get to that position without having incredible resolve and will and reserve of mental and emotional stamina. He is a great physical athlete, hits the ball beautifully and his backhand is incredible, but it was just his willingness to keep going and his willingness to butt heads with Nishikori.Mentally and emotionally, it might be more of a strain for him to recover than physically. Knowing what is at stake, I think it will be quite easy for him to get up for the rest of his matches here. Murray had to dig deep to beat Nishikori in what was the longest match in Tour Finals history The matchThere were no less than 17 breaks of serve during their US Open encounter but Nishikori, who could yet finish the year ranked No 3, failed to capitalise on those offered on a plate during an opening set lasting 85 minutes, including 40 unforced errors. Heres Murrays stunning cross-court winner on the run which left Nishikori at the net... After a slow-burner of an opening with both men failing to take opportunities to break, the first set tiebreak lit the blue touchpaper.Murray was forced to produce a remarkable reflex winner from an impossible angle to save a third set point at 6-3. But ultimately the Scot failed take any of his three opportunities created, while the 26-year-old broke Murrays resistance at the fifth time of asking to stun the home support. Nishikori needed a couple of smashes to eventually get past Murray after this exchange... That only inspired the 29-year-old, who started his fightback with an immediate response in the opening game of the next set. A re-energised Nishikori broke back in the eighth game, but Murray struck immediately back to send the match into a decider.Wimbledon and Olympic champion Murray took advantage of a lucky net cord in the third game to move ahead in the match and he quickly made it a double break advantage. Although Nishikori, who reached the 2014 semi-finals on his debut at the season finale, won the next three on the spin, it was the world No 1 who held his nerve to seal a famous win at the second time of asking. Heres the moment Murray closed out the match at the second time of asking... The victory made it 21 in a row for the Scot, who needs to match Djokovics performance this week to ensure he holds onto top spot until the end of the year.Check our game-by-game coverage from all group matches at the ATP World Tour Finals in London - including Andy Murray v Stan Wawrinka on Friday - on skysports.com/tennis, our app for mobile devices and iPad and our Twitter account @skysportstennis. Murray v Nishikori: Match Stats Murray Nishikori Aces 8 0 Double faults 6 4 1st serve points won 75% 72% 2nd serve points won 48% 40% Break points won 4/7 2/11 Unforced errors 39 49 Total points won 130/251 121/251 Upgrade to Sky Sports now to watch Man Utd v Arsenal this Saturday and get the first six months half price! Also See: WATCH: How good is Murray? As it happened... Murrays service syndrome over? That was pulsating tennis Cody Zeller Jersey . Peter Gammons, an analyst for Major League Baseballs network and website, drew the ire of hockey fans on Sunday when he criticized the two NHL teams on Twitter for their physical game the night before. Cody Martin Jersey . Jeff Green scored 13 points and Kris Humphries 12 for the Celtics, who nearly blew an 18-point, second-half lead. Sullingers 20-20 was the first by a Celtics player since Kevin Garnetts first game in Boston in 2007. Garnett was dealt -- along with Paul Pierce -- to Brooklyn during the off-season. https://www.hornetslockerroom.com/Malik-Monk-City-Edition-Jersey/ . Ivanovic was leading 7-5, 1-0 when Hantuchova withdrew after falling 0-40 behind in the second game. The match started slowly for Ivanovic, who surrendered her first two serves as Hantuchova took a 5-3 lead. Cody Martin Hornets Jersey . -- Canadian Andrew Wiggins got the ball on the wing, made a nifty spin move and then let go with a soft floater from about 10 feet that swished through the net in Allen Fieldhouse. Nicolas Batum Jersey . Louis Blues teammates who would also be participating in the Olympics, Alex Pietrangelo felt right at home, no different in some ways to the travel experience of any old road trip – save for the length of the journey, that is. No. 14 Washington | No. 16 USC | Top 25No. 15: TCULast Season: 11-2?(7-2 Big 12)The Horned Frogs trail only Washington among my surprise teams in 2016. They lacked that tough Gary Patterson defense last season, allowing 398.4 yards per game after pacing the conference with just 340.3 allowed over the previous three years. Last years unit brings back eight starters, putting the defensive line, linebackers and secondary position groups all in my top 20. Though they lose QB Trevone Boykin, WR Josh Doctson and RB Aaron Green on offense, I do like the replacements. Kenny Hill, who transferred out of Texas A&M, where he threw for 2,649 yards in 2014, fits well with the offense, while Kyle Hicks figures to take over at running back after averaging 4.8 yards per carry last year. TCU is an underdog against only Oklahoma (+3), which it beat in 2014. If the Horned Frogs upset the Sooners again, they would have a clear path to the Big 12 title and a playoff berth, assuming they handle a depleted Baylor team in a toss-up game late iin the year.ddddddddddddTCUs chances to win each game 09.03 vs. South Dakota State: 94.6% 09.10 vs. Arkansas: 56.2% 09.17 vs. Iowa State: 88.3% 09.23 @ SMU: 85.4% 10.01 vs. Oklahoma: 19.6% 10.08 @ Kansas: 88.1% 10.22 @ West Virginia: 41.7% 10.29 vs. Texas Tech: 71.9% 11.05 @ Baylor: 36.8% 11.19 vs. Oklahoma State: 39.8% 11.25 @ Texas:?39.0% 12.03 vs. Kansas State: 80.7%Dont sleep on these Horned Frogs. Experienced defense, lots of offensive weapons, favorable schedule, supremely well-coached. All they need is the best version of Kenny Hill to lead the charge. If they can beat Oklahoma on Oct. 1, an 11-1 season and a playoff bid are attainable. -- Max OlsonThe pieces are in place on both sides of the ball for the Horned Frogs to challenge in the Big 12. One of those is transfer QB Hill, who will be consistent enough for TCU to finish 9-3. -- Jake TrotterNo. 14 Washington | No. 16 USC | Top 25 ' ' '