Germany's Alexander Zverev serves during a men's singles second round match of BMW Open 2019 between Germany's Alexander Zverev and Argentina's Juan Ignacio Londero in Munich, Germany, on May 1, 2019. Alexander Zverev won 2-0 and advanced into the quarterfinals. (Xinhua/Philippe Ruiz)

MUNICH, May 1 (Xinhua) -- Two-time defending champion Alexander Zverev snatched the quarterfinal spot with a 7-5, 6-1 victory over Argentina's Juan Ignacio Londero on Wednesday at the Munich Open, stretching his winning streak at the Munich Open to nine matches at the tournament.

The German will face Cristian Garin on the outdoor clay. Garin upset the sixth-seeded Diego Schwartzman 6-1, 7-5.

Zverev is looking for his first title of the season and trying to protect his No. 3 ranking, which is under threat from Roger Federer.

Third-seeded Marco Cecchinato breezed past Martin Klizan 6-1, 6-3 to advance for a quarterfinal against Marton Fucsovics.

The eighth-seeded Fucsovics rallied to beat Brazilian qualifier Thiago Monteiro 6-7 (1), 6-4, 6-3.