ATP World Tour Finals debutants Gael Monfils and Dominic Thiem meet on Tuesday afternoon knowing a victory is crucial to their hopes of progressing at The O2. The pair suffered defeats on the opening Sunday of the event, Thiem slipping to a three-set defeat against former world No 1 Novak Djokovic having claimed the opening set, while Monfils gave big-serving Milos Raonic little to worry about in a 6-3 6-4 defeat.With just one more game to play, both players know a win is all-important particularly with Djokovic the dominant force in the group, the Serbs win over Thiem means he has won all 24 matches played against his rivals in the Lendl group. Ivan Lendl Group W-L Sets Games Milos Raonic 1-0 2-0 12-7 Novak Djokovic 1-0 2-1 18-9 Dominic Thiem 0-1 1-2 9-18 Gael Monfils 0-1 0-2 7-12 Thiem suffered on opening game defeat to Novak Djokovic in London Thiem will be the happier with his opening display having claimed a first set tie-break against Djokovic and with his final match against a Raonic who has struggled with injury, he will feel he is still in with a chance of making the last four on his first appearance at the season-end event.Monfils could not muster anything against Raonics powerful serve and knows the match against Thiem may be his best chance of keeping his hopes alive with Djokovic still to come.The Frenchman is up to a career high No 6 in the world rankings, while Thiem has claimed four titles this year, only Djokovic and world No 1 Andy Murray have claimed more. Thiem won the opening set against Djokovic before suffering defeat Both can claim to be enjoying their most consistent year on tour and their only 2016 meeting saw Thiem awarded the victory when Monfils was forced to withdraw from their last 16 encounter in Cincinnati.Their only other career meeting saw Thiem emerge victorious from a three-set battle on clay in 2015 but the conditions at The O2 are likely to level up an even-looking contest. Monfils was beaten in straight sets by Milos Raonic in their first game of the ATP World Tour Finals Opening up Tuesdays action in London will be the doubles match between Jamie Murray and Bruno Soares who face Bob and Mike Bryan in the Edberg/Jarryd group. Edberg/Jarryd Group W-L Sets Games B Bryan/M Bryan 1-0 2-0 13-6 J Murray/B Soares 1-0 2-0 13-9 T Huey/M Mirnyi 0-1 0-2 9-13 I Dodig/M Melo 0-1 0-2 6-13 Both pairs kicked off their campaigns with straight sets victories on Sunday and another win should assure them of a place in the last four.Second seeds Murray and Soares are looking to regain the No 1 ranking while the Bryan brothers are chasing a fifth success in the season-end championship having last claimed the title in 2014.All the action from the World Tour Finals between November 13-20 will be live on Sky Sports across the week and if you are out and about you can follow on our Sky Sports apps and the website via our live blogs. Full schedule here. Live Tennis: ATP World Tour Finals November 15, 2016, 12:00pm Live on Get Sky Sports Get a Sky Sports pass Also See: Gael force coming 2016 ATP season in stats Tour Finals at The O2 Shots to watch Puma Sale Ireland . 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Brisbane winger Corey Oates says his confidence is back after recovering from what he calls the three worst games of his NRL career.Oates has struggled badly since making his State of Origin debut but played himself back into top form with a hat-trick against Parramatta last week.It was a timely performance from the 21-year-old, who became a target for opposition kickers after revealing a lack of poise under the high ball.Oates had consecutive shockers against Penrith, the Sydney Roosters and St George Illawarra, and says hes beat himself up for dropping balls even a 10-year-old could catch.Ive let down myself (after) how good I started this year, he told reporters on Monday.After the Origin series, Ive probably come out and played my three worst games of my career.Im not reaal happy with my own performance and the fans arent too happy, either.ddddddddddddBut Oates said he felt as if hed turned a corner against the Eels, when he crossed for his second three-try haul of the year.It was probably one of my better games in the last month, he said.But I still feel like Ive got a fair few things to work on, obviously - a couple of dropped balls there, that one turned into a try.My confidence is right up there at the moment.Im one to sort of sit on things and let it get to me, but the last couple of weeks Ive been trying to not let it get in my head too much.The Broncos take on Canterbury on Thursday night at Suncorp Stadium. 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