Swiss tennis star Roger Federer will not be playing singles at the Laver Cup at the end of his career.

This was already clear beforehand, the 41-year-old told Swiss news agency SDA in an interview on Tuesday. “But with the mode at the Laver Cup, I think I will be able to play the doubles on Friday night,” Federer explained.

He said he had therefore asked team captain Björn Borg if that was OK with him. “He said it’s already a dream to see me on the tennis court again. I will give it a try. I was positively surprised by my level,” said the Swiss, who had trained with Greek Stefanos Tsitsipas on Monday and Tuesday.

The Laver Cup, which will be played for the fifth time in London from 23 to 25 September, pits a Team Europe against a Team World. On each of the three tournament days, there will be three singles and one double. In addition to Federer and Tsitsipas, record Grand Slam winner Rafael Nadal (Spain), Novak Djokovic (Serbia), Casper Ruud (Norway), and Briton Andy Murray will play for Europe. Team World consists of Felix Auger-Aliassime (Canada), Diego Schwartzman (Argentina), Taylor Fritz (USA), Alex de Minaur (Australia), Frances Tiafoe (USA), and Jack Sock (USA).