ATHENS, Ga. (AP) _ Top-seeded Pavel Kudrnac of Oklahoma State was upset by Virginia Commonwealth's Daniel Anderson on Friday in the NCAA Men's Tennis Championships _ the third consecutive year the No. 1 seed failed to advance past the quarterfinals.

Anderson beat Kudrnac 6-4, 6-4 in one of two upsets at the University of Georgia's Magill Tennis Center.

Georgia's John Roddick defeated No. 7 Robert Samuelsson of Tulane, 2-6, 7-6 (7-5), 7-6 (12-10). Roddick nearly retired from the match in the third set with severe cramps, but was cheered on in the tiebreaker by the pro-Georgia crowd.

In other quarterfinals matches, No. 4 Paul Goldstein of Stanford defeated No. 5 Thomas Dupre of Mississippi State, 7-5, 0-6, 6-1, and Stanford's Bob Bryan also advanced to the semifinals with a 7-6 (7-5), 6-2 victory over Pac-10 rival George Bastl of Southern California.

Saturday's semifinals have Bryan playing Roddick and Goldstein taking on Anderson. The championship singles match is Sunday.

In the doubles tournament, Stanford has placed two teams in Saturday's quarterfinals. Goldstein and Ryan Wolters, the No. 2 seed, won two matches Friday as did the Cardinal's duo of Bob and Mike Bryan. The Bryans are the No. 4 seeds in the tournament.

Also advancing to the quarterfinals were teams from South Alabama, UCLA, Tulsa, New Mexico, Kansas and Pepperdine.

The doubles teams have to win two matches Saturday to advance to Sunday's final.