WTA roundup: Top seed Donna Vekic upset in Hamburg

No. 1 seed Donna Vekic of Croatia was one of several seeded players to fall on Tuesday at the Hamburg European Open, with Australia's Storm Hunter rallying for a 3-6, 6-3, 6-3 upset victory in the first round in Germany.

Vekic committed seven double faults and only saved five of 10 break points in allowing Hunter to advance.

Also in the first round, Eva Lys of Germany dismantled second-seeded Mayar Sherif of Egypt 6-1, 6-1, and Australian Daria Saville blanked Italian fourth seed Jasmine Paolini in the first set en route to a 6-0, 7-6 (3) win.

In a second-round match, Russia's Diana Shnaider toppled Austrian fifth seed Julia Grabher 6-4, 6-2. In the quarterfinals she will face third-seeded Bernarda Pera, an American who beat Estonia's Kaia Kanepi 7-6 (6), 6-1 for her second victory in as many days.

No. 7 seed Arantxa Rus of the Netherlands beat Russian teenager Maria Timofeeva 6-2, 4-6, 6-1 in a first-round match, and Italy's Martina Trevisan took down eighth seed Camila Osorio of Colombia 6-1, 6-3 in the second round.

BNP Paribas Warsaw Open

No. 1 seed and home-crowd favorite Iga Swiatek of Poland got past Nigina Abduraimova of Uzbekistan 6-4, 6-3 in the first round in Warsaw.

Swiatek saved six of eight break points and capitalized on her opponent's 10 double faults to earn the win.

No. 2 seed Karolina Muchova of the Czech Republic stormed past Belarusian Aliaksandra Sasnovich 4-6, 7-6 (0), 6-3, and No. 4 seed Lin Zhu beat Xiyu Wang 6-4, 6-2 in an all-China first-round match. But Czech third seed Katerina Siniakova did not join them in the next round, with Great Britain's Heather Watson scoring a 7-5, 6-2 upset.

Tereza Martincova of the Czech Republic upset fifth seed Shuai Zhang of China 7-6 (3), 6-4, and Lucrezia Stefanini of