HOBART, Australia, Jan. 13 (UPI) -- Klara Zakopalova won a pair of matches, including an upset of No. 1-seeded Marion Bartoli, Thursday at the Hobart International tennis tournament in Australia.
Rain had played havoc with the schedule at Hobart, leading to the seven second-round matches and four quarterfinals being contested Thursday.
Zakopalova, seeded fifth, opened her day with a tight 1-6, 6-4, 6-2 victory over Alberta Brianti and advanced to a quarterfinal versus Bartoli, whose second-round match Thursday was a relatively easy 6-4, 6-1 win over Elena Vesnina.
In the quarters, Zakopalova was able to cash in six of her 10 break-point chances in a 6-4, 6-2 win over Bartoli in 78 minutes.
She'll go against sixth-seeded Jarmila Groth in the semifinals. Groth, who got her second-round match in Tuesday before the rains, took out Roberta Vinci 6-1, 6-2 in 47 minutes. Groth won 71 percent of the points and didn't face a break point.
Bethanie Mattek-Sands, who said she'll give 5 percent of her Hobart winnings -- she's guaranteed $10,200 as a semifinalist -- to Australian flood relief, won twice Thursday. She was a 6-3, 6-1 second-round winner over Ayumi Morita and claimed a semifinal slot with a 6-4, 6-4 upset of eighth-seeded Angelique Kerber.
Peng Shuai took the fourth semifinal position with a 6-1, 6-3 win over seventh-seeded Sara Errani. Peng won 79 percent of the points on serve.