Tennisstjernen Roger Federer came tremendously bad in the time with the men's sæsonfinale in London, when he late on Sunday lost its first group stage match.
The experienced schweizer met Dominic Thiem, and the austrian won in two sets 7-5, 7-5.
Federer was broken in the first set, but broke back to 2-2. Federer lost his serveparti to 5-6, and then took the Thiem first set.
In the second set it was equal until 5-5, when Federer was broken, and Thiem secured the victory afterwards.
This is the status in the Björn Borg group that Thiem and Novak Djokovic have both won a fight after Sunday's game.
The Serbian tennis champion did thus a short process, since he earlier on Sunday played the opening game at the sæsonfinalen.
Novak Djokovic won with the sovereign digits 6-2, 6-1 over Italian Matteo Berrettini, who is a debutant in the tournament.
Djokovic should just use the 64 minutes to win the match. Berrettini came with to 2-2 in the first set, but from there there was only one player on the field.
Monday is the Andre Agassi group, which counts Daniil Medvedev, Stefanos Tsitsipas, Alexander Zverev and the last Rafael Nadal.
the Season's eight best players participating in the tournament and are divided into two groups, from which the top two go through to the semi-finals played on Saturday.
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