Novak Djokovic has made the ideal start in his quest to win a record-equalling sixth ATP Finals title.
The world number two easily beat Italy's Matteo Berrettini in straight sets at the O2 Arena in London.
However, things weren't as rosy for Roger Federer, who was beaten by Dominic Thiem in his tournament opener.
It's the second year in a row that the seven-time Dubai Duty Free Tennis Championships winner has lost his opening match at the ATP Finals.
FIFA bans reusable bottles at World Cup venues citing safety concerns
Attendees of the World Cup will not be allowed to carry reusable water bottles into venues due to safety concerns, FIFA said on Thursday, following a last-minute change to its Stadium Code of Conduct.
Arnaldi through to semi-finals as fellow Italian Berrettini retires injured
Matteo Arnaldi has come out on top in an all-Italian clash at the French Open to reach his maiden Grand Slam semi-final after his opponent Matteo Berrettini retired injured while trailing 7-5 5-2 on Wednesday.
Yamal could be fit for World Cup opener: Spain coach
Spain coach Luis de la Fuente has stated that Lamine Yamal could be fit in time for the team's first World Cup match against Cape Verde on June 15 as the forward recovers from a torn left hamstring.
Mourinho lined up for Real return if Perez wins election
Jose Mourinho will return to manage Real Madrid if Florentino Perez wins the club's presidential election on Sunday, the sitting president confirmed on Wednesday as he campaigns for another term at the helm of the LaLiga club.
Cobolli overcomes Auger-Aliassime for Paris semis spot
Flavio Cobolli started slowly in wild and windy conditions at the French Open before blowing away Canadian fourth seed Felix Auger-Aliassime 4-6 6-4 6-4 6-4 on Wednesday, making the semi-finals at Roland Garros for the first time.
