Federer overcomes unforced errors to advance to Estoril semifinals
OEIRAS, Portugal -- Roger Federer struggled again with unforced errors but beat 146th-ranked Frederico Gil of Portugal 6-4, 6-1 Friday in an Estoril Open quarterfinal twice interrupted by rain.
Federer will meet 104th-ranked Denis Gremelmayr in the semifinal Saturday. The German defeated Jiri Vanek of the Czech Republic 6-2, 3-6, 6-2.
Second-seeded Nikolay Davydenko of Russia defeated seventh-seeded Marc Gicquel of France 6-4, 5-7, 6-3. Davydenko will face unseeded Florent Serra ...
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