Eurosport - Sat, 19 Apr 17:23:00 2008
Despite a series of unforced errors, Federer took advantage of two match interruptions caused by rain to improve his game and beat Portuguese player Frederico Gil 6-4 6-1 under the gaze of his new coach and clay expert Jose Higueras.
"Gil played an excellent set-and-a-half," said Federer. "Thank God I could use the rain delays to improve my level of play."
The 26-year-old Swiss will meet unseeded Denis Gremelmayr of Germany on Saturday after he beat Czech Jiri Vanek 6-2 3-6 6-2.
A visibly irritated and tired Davydenko struggled to overcome Frenchman Marc Gicquel's powerful baseline game 6-4 5-7 6-3 in a gruelling two-and-a-half-hour match.
"I was tired and really nervous because of the weather," said Davydenko, the world number four and a winner in Estoril in 2003.
"Every point that I missed, every easy mistake, I was feeling more crazy - but I was fighting until the end and I won the match."
The Russian said his mental strength helped him overcome his exhaustion and the adverse weather conditions.
"I think it's the biggest strength I have," said Davydenko, who won the Miami title two weeks against over world number two Rafael Nadal.
He will face another Frenchman, Florent Serra, in Saturday's other semi-final. Serra defeated Italian Flavio Cipolla 6-1 6-1 in the last eight.
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