Nice match and a good preparation for the final. Hopefully he plays better than he did today against Marin
I remember in 2015 after he lost to Djokovic in the final, after playing near perfect tennis against Murray in the SF, Federer said in retrospect he'd peaked a round too early because he'd left his best tennis on the court in the Murray match. Hopefully this means he learned from that. He did what he needed to do to win and move on to the final. I think he knows Cilic is going to be a bigger challenge than Berdych. Cilic will be trying to channel his 2014 US Open form - and hoping Roger's as tired as he was that day and isn't playing his best tennis. After seeing the way Roger fought for it against Nadal at the AO, I think Cilic probably has to hope he can win it 3 or 4 and hit Roger off the court - because he's definitely played more tennis these 2 weeks than Roger's had to.