The age gap hasn't changed between Rafa and Federer lol. They are both getting old. Federer has just the same disadvantage he has always had. If Roger can win five times in a row against Rafa a couple of years ago he can win on clay against the Rafa in current form if he plays a great match. Rafa lost to Thiem, Fognini and Tsitsipas. Roger is one of the greatest clay court players of all time. I have him only behind Rafa and Borg. No other player was winning French Opens during Rafa's peak and Fed had his chances in 06, 07 and 11.I think it is. There's no way a near 38 year old Fed is beating Nadal on clay, no matter how bad Rafa is playing.