Andy Murray will be looking to extend his winning run to 22 matches and book his place in the semi-finals of the ATP World Tour Finals when he faces Stan Wawrinka on Friday afternoon. Murray has won both of his contests thus far in the John McEnroe Group, beating Marin Cilic in straight sets and then Kei Nishikori in a three-set epic.But he could still be eliminated if he loses to Wawrinka in straight sets and Nishikori beats Cilic in the groups other match in the evening on Friday. Murray v Stan: A battle royale Expect sparks to fly at Londons O2 Arena on Friday afternoon... Murray leads the head-to-head 9-7 against the Swiss, and has his sights set on a perfect final against Novak Djokovic that would decide the year-end No 1 ranking.I think for the tournament and stuff, for everyone interested in tennis, that would probably be the perfect way to finish the year, he said. Murray talked to Mark Petchey at the SkyPad after his victory over Nishikori For me, and Im sure for Novak, both of our goals would be to try to win the event. For him, whether thats by beating me, someone else, or, for me, if its winning against Novak or another player, it doesnt change for us as players.Murray was pushed to the limit by Nishikori in the longest three-set match in ATP World Tour Finals history, which lasted three hours and 20 minutes. John McEnroe Group W-L Sets Games Andy Murray 2-0 4-1 30-20 Kei Nishikori 1-1 3-2 27-23 Stan Wawrinka 1-1 2-2 19-24 Marin Cilic 0-2 0-4 17-26 He acknowledged afterwards that he was a bit tired, but added: You tend to feel it more the following day, in terms of stiffness and soreness in the body. I was in the ice bath after the match. That obviously helps make you feel a bit better. But 10-12 hours afterwards the body starts to stiffen up. Its positive I get a days rest.After losing his first match, Wawrinka kept his hopes of progressing alive with a 7-6 (7-3) 7-6 (7-3) victory over Cilic on Wednesday. Murray is one win from matching his career-best 22-match undefeated run from earlier this season, during which he won Queens, Wimbledon and Olympic gold All I know is if I want to have a chance to qualify, I need to win, he said afterwards. 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 many times against each other. Hes playing his best tennis so far. Its going to be interesting. Im happy to play here in front of his home crowd. Im sure its going to be a great atmosphere.The only meeting between Murray and Wawrinka in 2016 was in the semi-finals of the French Open, with the world No 1 coming through in four sets. Watch highlights of Murrays win over Nishikori However, Wawrinka won their round-robin clash at the O2 last year 7-6 (7-4) 6-4.In the doubles match, Henri Kontinen and John Peers will be looking to make it three wins from three when they face world No 1 duo Pierre-Hugues Herbert and Nicolas Mahut.Hugues and Mahut are already eliminated after two defeats and could slip from the top of the rankings if Jamie Murray and Bruno Soares reach the final.Kontinen and Peers are already assured of a semi-final place, having won both their matches in straight sets.Watch the ATP World Tour Finals on Friday from midday on Sky Sports 1 HD or follow on www.skysports.com. Also See: One of Murrays best-ever matches Murray targets perfect final Wawrinka keeps hopes alive Stan sets sights on Murray Montez Sweat Redskins Jersey . Andreas Johnson had a goal and two assists while Jacob de la Rose also scored for Sweden (2-0-0). 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LUCIE, Fla. PORTLAND, Ore. -- While Damian Lillard and CJ McCollum didnt have their usual offensive outburst against Miami, they both got baskets when it mattered.Lillard scored 19 points and McCollum had 17, including a pair of late baskets, to rally the Portland Trail Blazers to a 99-92 victory over the Heat on Saturday night.We just find a way, Lillard said. Youve got to gut one out like that. Find a way when your offense isnt there. I think that shows great character for our team and it shows growth.Hassan Whiteside had 28 points and 16 rebounds for the Heat, who missed out on their first three-game winning streak of the season.Whitesides follow shot put the Heat ahead 91-85, but McCollum made a 3-pointer with 2:57 left and Maurice Harkless free throws narrowed the gap to 91-90 with 2:26 remaining.Wayne Ellington hit a free throw for Miami, but McCollum converted a layup and Harkless banked in a jumper to give Portland a 94-92 lead.McCollum added a jumper with just under a minute left and Portland held on for the win, outscoring the Heat 14-1 in the final 2:57.Harkless also scored 17 points for Portland, which has won three of four.The Heat, at 7-13, have struggled at times following Dwyane Wades departure for the Chicago Bulls after 13 seasons in Miami.Youd like to go 3-0 but anytime you go positive on a road trip its a motivation, Whiteside said, noting the Heat went 2-1 on the three-game swing. We can build on this.Miami also is grappling with injuries. The team announced before the game that forward Luke Babbitt would not play because of a hip flexor. He joined forward Justise Winslow (wrist), guard Dion Waiters (groin) and Josh Richardson (ankle) on Miamis injured list and left the Heat with only 10 players available for the game.Ellington, appearing in hiss fourth game since returning from a deep thigh bruise, made his first start for the Heat.dddddddddddd He finished with 12 points.Meyers Leonards alley-oop dunk from Evan Turner gave the Blazers a 73-68 lead late in the third quarter. The Heat were hurt with 20 seconds left when James Johnson was ejected with a second technical when he got upset about a non-call.Portlands recent resurgence comes with a new focus on defense.We locked in, guard Allen Crabbe said. Defense is really a priority for us now.TIP-INSHeat: The team ate on Friday night at 23Hoyt, the Portland restaurant that is partly owned by Miami coach Erik Spoelstra. Spoelstra grew up in Portland, and played for the Portland Pilots. ... The Heat had three technical fouls in the first half.Trail Blazers: Following Saturday nights game, Portland heads out on a five-game road trip. ... McCollum missed a foul shot in the third quarter, snapping a run of 30 consecutive made free throws.WINNING TRIPSpoelstra said the positive road trip wouldnt sink in until later.By the time we get on the plane Im sure well feel that way, but right now it stings, he said. You get up six and we really started to clamp down against a very dynamic, talented, well-schooled and experienced offensive team. They bring a lot at you but our guys were not backing off and making it as tough as possible.KEEPING IT UNDER 100It was just the third game this season that Portland has kept its opponent under 100 points -- demonstrating again the renewed commitment to defense. The Blazers are 3-0 in those games.UP NEXTHeat: Host the New York Knicks on Tuesday.Trail Blazers: Visit the Chicago Bulls on Monday. ' ' '