Switzerland's Roger Federer serves to Croatia's Marin Cilic for their second round match on day 5, of the French Open tennis tournament at Roland Garros in Paris, France, Thursday, June 3, 2021. (AP Photo/Michel Euler)

BASEL, Switzerland (AP) — The Swiss Indoors tournament was canceled Friday for the second straight year because of the COVID-19 pandemic.

Tournament organizer Roger Brennwald said “many questions remain unanswered” for the Oct. 25-31 event despite falling infection rates in Switzerland.

A successful tournament “with thousands of spectators per day, all of whom will be indoors, cannot be guaranteed,” Brennwald said.

Roger Federer won a record 10 titles, including the past three editions from 2017-19, at the Basel tournament where he was once a ball kid.

He will have turned 41 before the next scheduled Swiss Indoors in October 2022.

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