Top-seeded Jimmy Connors and third-seeded Aaron Krickstein were upset in the quarterfinals of the $375,000 Pilot Pen Classic tournament in La Quinta, Calif.

Connors was overwhelmed by 14th-seeded Greg Holmes, 6-0, 6-3; Krickstein lost to unseeded David Pate, 6-2, 2-6, 6-1. No. 9 Libor Pimek is the highest seed in the semifinals. He eliminated unseeded John Lloyd, 6-1, 1-6, 6-4. Larry Stefanki, a wild-card entry, beat Tarik Benhabiles, 7-5, 7-6 (7-2) . . .

Wojtek Fibak upset fifth-seeded Gene Mayer, 6-1, 1-6, 6-4, in the quarterfinals of the $200,000 Molson Light Challenge in Toronto. In the semifinals, Fibak will play top-seeded Anders Jarryd, a 7-6 (7-5), 6-0 winner over Peter Fleming. Second-seeded Eliot Teltscher beat No. 6 seed Ramesh Krishnan, 6-2, 6-4, and will play No. 3 seed Kevin Curren, who ousted Bud Schultz, 6-2, 6-0 . . .

In Oakland, defending champion Hana Mandlikova defeated No. 2 seed Wendy Turnbull, 6-3, 6-4, in the quarterfinals of the Virginia Slims of California. Third-seeded Helena Sukova beat Andrea Temesvari, 7-6 (7-2), 6-2; and No. 4 Zina Garrison defeated Barbara Potter, 7-5, 4-6, 6-1.