ST. POLTEN, Austria, May 19 (UPI) -- Daniel Koellerer moved into the first ATP quarterfinal of his career Wednesday by ousting Ivo Karlovic at the International Raiffeisen Grand Prix.
Koellerer, a 20-year-old from Wels, Austria, defeated his Croatian opponent, 6-2, 4-6, 6-3 in a second-round match.
Next up for Koellerer will be Xavier Malisse of Belgium, who got past lucky loser Hugo Armando of the United States, 6-2, 6-2, on Tuesday.
The only other seeded player scheduled to compete on Wednesday was No. 6 David Sanchez of Spain, who won his contest when Stefan Koubek of Austria withdrew with a fever.
Jurgen Melzer of Austria moved into his second straight quarterfinal with a 6-3, 7-5 win over Russian Igor Andreev. Melzer ousted top seed Marat Safin of Russia last week in the quarterfinals of the ATP Masters Series at Hamburg.
