I understand Andre changing his mind. His previous opinion dated back to 2014. Since then, Federer has dominated Nadal, won 3 slams, oldest man to win Wimbledon, oldest #1, Eclipsed 100 titles, was one point away from winning Wimbledon at 38 years old. That's just a little bit of what he has done since. It's perfectly logical for him to change his mind. It's pretty hard to stick with Nadal after such ownage by Federer.