David Harkness of BYU, won two matches on Friday and advanced to the semifinals of the Rolex National Indoor Championships.

Harkness defeated Steve Longley of South Carolina, 6-3, 7-6 (7-2), setting up a semifinal match against seventh seeded Dan Goldberg, of Michigan.Meanwhile, BYU junior Mary Beth Young upset 24th-ranked Eveline Hamers of Kansas 6-4, 6-2 and 13th-ranked Jennifer Young of Miami 6-1, 2-6, 6-1.