Andy Murray will be required to conjure up more of his remarkable powers of recovery if he is to make it through to the semi-finals of the ATP World Tour Finals on Friday. Having beaten Marin Cilic and Kei Nishikori, the world No 1 only needs to win a set against Stan Wawrinka to guarantee his passage through to the semi-finals at the O2 Arena for the first time since 2012. Six months half price Upgrade to Sky Sports to watch Man Utd v Arsenal on Saturday and get the first six months half price But he will have to drag his weary body through another tough test as an explosive season finale draws ever closer. World No 3 Wawrinka showed much better form in beating Cilic on Wednesday than he had in his limp loss to Nishikori and the Swiss knows that a straight-sets win over Murray would maintain his record of always reaching the last four. Sky Live: Murray v Wawrinka Andy Murray takes on Stan Wawrinka at ATP World Tour Finals Nothing comes easy against the very best players in the world, let alone against the US Open champion who has suddenly clicked in London - something Sky Sports analyst Mark Petchey acknowledges.Wawrinka is always the wildcard in the pack, hes the guy that when hes confident, hes got the power to get through tough surfaces and he does a lot of things well, said Petchey. He moves better than people give him credit for and as I say it was an intelligent performance with the use of the slice. Its not just about the power and the showbiz tennis. Wawrinka beat Murray at the Tour Finals in London last year Friday will be the 17th meeting between the pair, with Murray leading the head-to-head record 9-7, and when they do clash, sparks usually fly.Wawrinka, who sealed his first major title at the 2014 Australian Open before winning an ATP Tour 500 and 1000 event, last faced the Scot in the French Open semi-finals.That was one of Murrays most impressive performances of the season and ended a run of three straight losses to Wawrinka, including at the O2 last year with qualification at stake. Murray also suffered a 6-1 6-2 defeat to Wawrinka at the Monte Carlo Masters in 2013 Wawrinka, who faces a battle to hold on to the world No 3 ranking, said: All I know is, if I want to have a chance to qualify, I need to win. Thats all Im trying to do.Im going to try to play my best tennis, to beat the world No 1. Its going to be a tough match. We played each other many times. Live Tennis: ATP World Tour Finals November 18, 2016, 12:00pm Live on Get Sky Sports Get a Sky Sports pass The hardcourt surface at the O2 Arena will suit Wawrinkas heavy hitting style of game from both flanks, but hell have a job breaking down a resilient Murray. The 29-year-old is a totally different prospect to the one he faced in the US Open quarter-finals and Monte Carlo Masters in 2013.Arguably the most famous meeting between the two came under the Wimbledon lights in 2009 in a contest lasting three minutes short of four hours, which the Scot won in dramatic fashion. Could it more of the same on Friday? Mark Petchey and Greg Rusedski discuss Murray’s epic win over Nishikori and his chances against Wawrinka Obviously its going to be a tough match, said Petchey. Theyve had a lot of tough matches in the past and this will be another one.Andy is the form player right now and Im sure inside hes feeling pretty invincible every match he steps out on court. WATCH: Murrays double take Andy Murrays remarkable winner against Kei Nishikori was reminiscent of his winner in Rome Weve got a couple of guys out here who are Grand Slam champions who both believe they can win every single match they step out on court with, no matter who theyre playing, where theyre playing in the world, on what surface theyre playing in the world.So both of those players are going to go into that clash on Friday believing and knowing at the moment they still need to win it. Murrays service syndrome over? Andy Murrays service syndrome may be a thing of the past Should Murray win his group, he would play Milos Raonic in the semi-finals on Saturday in a repeat of their Wimbledon final and Australian Open semi-final. Let battle commence...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 afternoon - on skysports.com/tennis, our app for mobile devices and iPad and our Twitter account @skysportstennis. Upgrade to Sky Sports now to watch Man Utd v Arsenal this Saturday and get the first six months half price! Also See: Murray beats Nishikori in epic WATCH: Murrays double take One of the best matches ever Wawrinka keeps hopes alive Willy Adames Rays Jersey . Pierre last November, only to watch St. Pierre leave the UFC octagon with his welterweight title belt and a split-decision victory. Anthony Banda Jersey . Rockies manager Walt Weiss was unhappy, too. Weiss addressed the issue in a 15-minute meeting with his pitcher and catcher after the Rockies gave up 14 hits and lost 10-1. De La Rosa lasted only 4 1-3 innings and allowed five runs in his first opening-day start. https://www.cheapraysonline.com/1006i-guillermo-heredia-jersey-rays.html .com) - Former foes from the Mountain West Conference battle in the 23rd annual Las Vegas Bowl, as the 23rd-ranked Utah Utes clash with the Colorado State Rams at Sam Boyd Stadium on Saturday. Yandy Diaz Jersey . The 34-year-old averaged 10.1 points and 2.7 rebounds in 82 games played in 2013-14 with the Utah Jazz. Jefferson has averaged 14.5 points, 4. Travis dArnaud Rays Jersey . Having won the first leg 1-0 in Barcelona, Madrid entered the match at the Santiago Bernabeu Stadium already in control and quickly sealed its place in the semifinals when Jese Rodriguez scored in the seventh minute.AUSTIN, Texas -- Hilary Caldwell of White Rock, B.C., won gold in the womens 200-metre backstroke, and Dominique Bouchard of North Bay, Ont., was second at the U.S. Grand Prix swimming competition on Saturday. Caldwell swam almost seven seconds faster than her time in the preliminaries, finishing in two minutes and 10.78 seconds. Bouchard followed in 2:12.06, Megan Romano of the U.S. was third in 2:13.16 and Meryn McCann of Burlington, Ont., placed fourth in 2:13.53. Danielle Hanus of Newmarket, Ont., was also in the final and placed eighth. "This event is a great preparation for the Commonwealth Games and Pan Pacific Championship trials that are coming up," said Caldwell.dddddddddddd"It gives us a good indication of where we stand heading into the next phase of training." Other Canadian women finalists were Victoria Poon and Hannah Riordan, both of Montreal, who finished fifth and eighth, respectively in the 50 freestyle, and Tera Van Beilen of Oakville, Ont., who placed eighth in the 400 individual medley. On the mens side, Vancouvers Stephan Milosevic was seventh in the 200 freestyle and Matthew Swanston of Newmarket, Ont., placed eighth in the 200 backstroke. ' ' '