BASEL, Switzerland (AP) Roger Federer has easily won his opening match in his hometown tournament, beating Alexandr Dolgopolov 6-4, 5-2 in the Basel Indoors.

Federer was serving for the match Monday when his Ukrainian opponent fell and hurt his ankle. Two trainers tended to Dolgopolov but he was unable to continue, ending the match in 48 minutes.

The top-seeded Federer will meet Janko Tipsarevic of Serbia or Denis Istomin of Uzbekistan in the second round.

Federer won this tournament for three straight years before losing to Novak Djokovic in last year's final. Djokovic begins his title defense against Ernests Gulbis.