Roger Federer has confirmed he could wait to make a decision on whether to participate at the Paris Masters until Monday.
Federer made it 10 wins at the Swiss Indoors after beating Alex de Minaur in the final 6-2 6-2.
The tournament becomes the second place where Federer has won 10 times and it puts him back up to third in the ATP Race to London standings.
Next up for Federer is the Paris Masters, which gets underway on Monday.
And he is drawn to play either Nikoloz Basilashvili or Radu Albot in the second round.
But speaking after winning the Basel, the 38-year-old revealed he has yet to decide whether he will play in Paris.
He said: “I could play, but I haven’t decided yet. Tonight and tomorrow I will see myself with my team to decide what to do and also to talk about next year’s schedule.”
He also told SRF Sport: “My main goal is to be perfectly fit for London.
“I was close to big titles this year, Indian Wells, Wimbledon, I’d like to win a big one this year and London is one of those.”
After the draw on Friday, Paris tournament director Guy Forget said he was remaining optimistic Federer will play.
He said: “When you see players who have already arrived in the capital like Rafa, Novak Djokovic, Zverev, all the players in the world are here, with the exception of those still in the race in Basel and Vienna.
“Roger has lost six games in Basel, he qualified [for the semi-finals] without playing against Stan Wawrinka.
“We want to see the glass half full. He is not too tired, I have hope. We often had news on Sunday evening [which was] unfortunately a little sad. But we will remain optimistic. We have 95 per cent of the world’s best, with Roger it would be even better.”
Should Federer decide to pull out, it would give him two weeks to prepare for the season-ending ATP Finals in London.