WTA roundup: 19-year-old reaches Hamburg semis in tour debut

German 19-year-old Noma Noha Akugue rallied for a 5-7, 6-4, 7-5 win over Italy's Martina Trevisan to continue a storybook run to the semifinals in her WTA debut at the Hamburg European Open on Thursday in Germany.

Noha Akugue had leads of 3-1 and 4-3 before Trevisan fought back to win two games and take a 5-4 lead. Noha Akugue then broke Trevisan's serve in the 10th game of the set and wouldn't lose a game the rest of the way, finishing the job in two hours and 42 minutes.

In the semifinals, Noha Akugue will face Russia's Diana Shnaider, who upset third-seeded Bernarda Pera 6-1, 2-6, 6-4. Shnaider - also 19 years old - saved seven of 10 break points.

The other semifinal match will pit Dutch seventh seed Arantxa Rus against Australian Daria Saville. Rus swept past Germany's Eva Lys 6-2, 6-2, while Saville took down Jule Niemeier 6-3, 6-2.

BNP Paribas Warsaw Open

Polish No. 1 seed Iga Swiatek cruised into the quarterfinals with a 6-2, 6-2 victory over Claire Liu in the second round in Poland.

Swiatek saved five of six break points and won 28 of her 38 first-service points (73.7 per cent) to beat Liu. In the next round Swiatek will meet eighth seed Linda Noskova of the Czech Republic, who beat Slovakia's Viktoria Hruncakova 6-3, 6-3.

Rebecca Sramkova of Slovakia upset Czech second seed Karolina Muchova 7-5, 3-6, 7-5 in three hours and one minute. Sramkova overcame nine double faults by winning eight of her 12 break-point opportunities and saved eight of 16 break points she faced.

Laura Siegemund of Germany knocked off fourth seed Lin Zhu of China 6-4, 6-4. Great Britain's Heather Watson and Italy's Lucrezia Stefanini also advanced.

Ladies Open Lausanne

France's Clara Burel saved eight of 10 break points and broke her opponent's serve