Wednesday, July 12, 2017 Tomas Berdych is excited ahead of his semifinal against Roger Federer on Friday. After Novak Djokovic retired down 7/6 2/0, the Czech player said: 'No matter if it's Roger or if it's Novak, or a guy in the first round, what's most important is myself, my game, belief in what I'm doing. I just need to go out there and play my best.' He also praised Federer, beaten by Berdych in 2010 here at Wimbledon: 'It's a really exceptional tennis player that we have, that our sport has right now. There was nobody better in the past - I think he's the greatest of them all. It's a great challenge to have the opportunity to play him', said the World No. 15, who lost 18 matches to Federer and won six, last one in 2013 Dubai.