Fognini dumps Davydenko at Stuttgart
The 22-year-old Italian, ranked No. 67, last reached the final four in July 2008 at Umga, Slovenia. He is looking for his first title on the ATP tour.
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Fognini's match was interrupted by rain for about 30 minutes at 4-4 in the third set.
Davydenko double-faulted to give two match points to Fognini, who won when the Russian sent a backhand wide on the second.
The rain returned after the match and the organizers were forced to postpone the other two quarterfinals until Saturday.
Copyright 2009 by The Associated Press
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