Zverev reaches finals of Citi Open

WASHINGTON (AP) — Defending champion Alexander Zverev has reached the final at the Citi Open.

The No. 1-seeded Zverev defeated 10th-seeded Stefanos Tsitsipas 6-2, 6-4 in the semifinals Saturday. Sixteenth-seeded Andrey Rublev beat unseeded Denis Kudla 6-1, 6-4 in one quarterfinal and will face Alex de Minaur in the other semifinal Saturday night.

De Minaur reached the semis when former No. 1 Andy Murray withdrew from the hard-court U.S. Open tuneup, citing fatigue.

Zheng Saisai beat Allie Kick 6-3, 6-1 in the women's quarterfinals, advancing to face seventh-seeded Donna Vekic in one semifinal Saturday night. Svetlana Kuznetsova faces Andrea Petkovic in the other semifinal Saturday.

• • • MONTREAL (AP) — Serena Williams has pulled out of next week's Rogers Cup hard-court tournament, citing personal reasons.

The tournament announced Williams' withdrawal on Saturday.

The 23-time Grand Slam champion is coming off the most lopsided defeat of her career, a 6-1, 6-0 loss to Johanna Konta in San Jose, California, on Tuesday.

The 36-year-old Williams was the runner-up at Wimbledon last month. That was just her fourth tournament since returning to the tour after having a baby in September and dealing with a health scare related to blood clots.