PATTAYA, Thailand — American Jill Craybas and top-seeded Agnieszka Radwanska advanced today to the semifinals of the Pattaya Women's Open.

Craybas defeated Andreja Klepac 6-4, 6-4, and Radwanska beat Tamarine Tanasugarn 6-2, 6-3.

Radwanska, ranked 21st, took advantage of her Thai opponent's mistakes to breeze to a 5-0 lead in the first set.

Radwanska will face Ekaterina Bychkova, who saved a match point to beat Vesna Manasieva 4-6, 7-6 (6), 6-3 in a 2-hour, 31-minute match.

Craybas will play Akgul Amanmuradova of Uzbekistan, who beat fourth-seeded Chan Yung-jan of Taiwan 6-1, 7-6(4).