Federer Chokes Against Tsonga in Montreal

I can’t believe Fed blew a double-break (5-1) lead in the 3rd set to lose the match against Tsonga in Montreal. I’m almost beginning to think he lost on purpose, just to pace himself before the US Open. Because right now Tsonga looks like he’s about to lose to a frickin qualifier in the 2nd round at Cincy. How could Fed lose to Tsonga?!