Top-seeded Roger Federer upset in semifinals of Gerry Weber Open

HALLE, GERMANY - JUNE 18: during day six of the Gerry Weber Open at Gerry Weber Stadium on June 18, 2016 in Halle, Germany. (Photo by Thomas Starke/Bongarts/Getty Images),HALLE, GERMANY - JUNE 18: Roger Federer of Switzerland says goodbye to the spectators after losing the half final match against Alexander Zverev of Germany during day six of the Gerry Weber Open at Gerry Weber Stadium on June 18, 2016 in Halle, Germany. (Photo by Thomas Starke/Bongarts/Getty Images)

HALLE, Germany -- Roger Federer's bid for a ninth title at the Gerry Weber Open came to an end Saturday when he was beaten in the semifinals by Alexander Zverev, a rising German prospect who notched the biggest win of his young career.

Zverev's 7-6 (4), 5-7, 6-3 victory over the top-seeded, eight-time defending champion gave him a place in his first final of the year.

It also means that Federer, with 17 Grand Slam titles, still remains without a title this year, marred by knee surgery and a back injury that forced him to miss the French Open.

For Federer, the Gerry Weber Open served as a tune-up for Wimbledon, which begins June 27.

The 19-year-old Zverev was one year old when Federer made his debut on the tour.