ST. POLTEN, Austria, May 20 (UPI) -- Austrians experienced mixed results Thursday in the quarterfinals of the International Raiffeisen Grand Prix.
Sixth seed Daniel Sanchez of Spain advanced when No. 3 Nikolay Davydenko of Russia, the runner-up here last year, retired with a pulled chest muscle after the players split the first two sets.
In the semifinals, Sanchez takes on No. 8 Filippo Volandri of Italy, who ousted Romania's Victor Hanescu, 6-4, 6-3.
In Friday's other semifinal, Malisse faces Melzer, who won earlier this year at Boca Raton and reached the quarterfinals last week at the ATP Masters Series event in Hamburg.