I appreciate what Ljubicic has done for Federer, but it's clear that his style of play isn't working anymore. Federer is making too many errors on standard basic shots because his reflexes have slowed down. He can't stand right on the baseline hitting half volleys and taking the ball early. He can't do that. I think time has come to get rid of Ljubicic and bring back Edberg or someone of the similar mold, because Federer needs to go back to his 2014-15 game to be a top contender again. He can't keep on playing this style of play or he will slide down the rankings really quick.