Roger Federer praised Andy Murray's weekend Antwerp title just 10 months after the former number one underwent a hip resurfacing.
"Andy's achievement was great," Federer said after rolling through into the second round of the ATP Swiss Indoors in Basel.
"I was a little bit torn, since he beat (fellow Swiss) Stan (Wawrinka) in the final, but it was a great way for him to come back."