Tomas Berdych stuns Roger Federer to set up Dubai Open final with Novak Djokovic Czech Republic's Tomas Berdych celebrates after beating Switzerland's Roger Federer in their Dubai Open semi-final. CHARGING Czech Tomas Berdych saved three match points to stun five-time champion Roger Federer 3-6 7-6 (10-8) 6-4 today to set up a Dubai Open final with Novak Djokovic. Federer had his three match-winning opportunities in the second set tiebreaker but missed on them all, allowing Berdych to level at a set each on his third set point. The match went into a deciding set, where the Czech expanded an early lead into a 4-2 margin. Federer saved two match points in the ninth game before the Czech fired his eighth ace for a match point and won on a final error from the Swiss after two hours, 19 minutes. ``It feels amazing," said Berdych. ``Roger is such a great player, he's done so much. It came down to just a point or two and I was maybe able to manage it better than he did. ``I've been working a lot on my game, especially my serve. I'm so happy to be in the final, but it doesn't get any easier. There's not much to say when you play Djokovic. ``I have to rest, prepare and start again tomorrow. The win was the fifth for Wimbledon finalist Berdych from his last eight meetings with Federer, including their most recent match in a US Open quarter-final won by the Czech. The defending champion Swiss world No.2 has not won a title since last August in Cincinnati. Djokovic beat a frustrated but fighting Juan Del Potro 6-3 7-6 (7-4) to reach tomorrow's final. The world No.1, who lifted the trophy at the Aviation club each year from 2009-11, is looking for a second trophy in 2013 after winning the Australian Open. His victory was his eighth over Argentine fourth seed Del Potro against two defeats. The Serb top seed stands 12-0 this season and 27-3 in Dubai. ``I was very pleased with the performance overall and the way I handled myself in the tough moments," said Djokovic. ``Mentally I stayed tough and believed that I could go all the way and win in straight sets. ``I didn't really allow myself to be negative. But it's becoming a tradition in this tournament to drop a serve when I'm serving for a match. Hopefully it's not going to happen another time tomorrow.