Alexander Zverev knows victory against John Isner in his final round-robin match will ensure he reaches the semi-finals of the ATP Finals.
Six-time champion Roger Federer reached the last four of the ATP Finals for the 15th time in 16 appearances after defeating Kevin Anderson on Thursday night.
Roger Federer insists he isn't thinking about the opportunity of winning his 100th career title after he progressed to the semi-finals of the ATP Finals in London.
Alexander Zverev reaches semi-finals with win against John Isner before Novak Djokovic defeats Marin Cilic in Group Guga Kuerten.
Dominic Thiem kept alive his slim chances of qualifying for the semi-finals of the ATP Finals with a 6-1 6-4 victory over Kei Nishikori at London's O2 Arena.
John Isner said it had been "very difficult" to focus on his second match at the ATP Finals after learning of the death of his close friend.
Roger Federer goes into the final day of round-robin matches against Kevin Anderson with Group Lleyton Hewitt finely poised.
Perennial O2 loser, Marin Cilic, finally got into the winning habit with only his second victory in 11 matches at the ATP Finals.
Roger Federer reaches semi-finals of ATP Finals with victory against Kevin Anderson, after Dominic Thiem beats Kei Nishikori.
Novak Djokovic says Alexander Zverev is "the leader of the new generation" after his 6-4 6-1 victory over the German at the ATP Finals on Wednesday.
Greg Rusedski says you can "never discount" Roger Federer as the Swiss prepares to take on Kevin Anderson in a crunch clash at the ATP Finals on Thursday.
Novak Djokovic remains a red-hot favourite to draw level with Roger Federer on six titles at the ATP Finals after coming through against Alexander Zverev on Wednesday.
Britain's Jamie Murray and Brazilian partner Bruno Soares have clinched their place in the ATP Finals doubles semi-finals for the third straight year.
Roger Federer has hit back at claims he gets preferential treatment from tennis tournaments due to his status as one of the sport's all-time greats.
Novak Djokovic and Alexander Zverev will look to continue their winning starts at the ATP Finals as they face each other on Wednesday, live on Sky Sports.
Roger Federer put himself in with a chance of progressing to the knockout stages of the ATP Finals after defeating Dominic Thiem in straight sets on Tuesday night.
Roger Federer has confirmed that his four-year-old sons Leo and Lenny have been playing tennis "for a few years now".
Kevin Anderson says Tuesday's 6-0 6-1 victory over Kei Nishikori at the ATP Finals in London ranks among the best wins in his career.
Marin Cilic beats John Isner at the ATP Finals after Novak Djokovic defeats Alexander Zverev in Group Guga Kuerten.
Kevin Anderson moved a step closer to the semi-finals of the ATP Finals by crushing Kei Nishikori 6-0 6-1 in Group Lleyton Hewitt at London's O2 Arena.
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