Pella progresses at Stuttgart Open; Zverev to play Federer

Tennis Player Roger Federer attends a news conference during the Mercedes Cup ATP World Tour tournament in Stuttgart, Germany, Monday, June 11, 2018. (Sebastian Gollnow/dpa via AP)

Pella progresses at Stuttgart Open; Zverev to play Federer

Tennis Player Roger Federer attends a news conference during the Mercedes Cup ATP World Tour tournament in Stuttgart, Germany, Monday, June 11, 2018. (Sebastian Gollnow/dpa via AP)

STUTTGART, Germany (AP) -- Guido Pella of Argentina defeated John Millman of Australia 6-2, 6-2 to join three Germans in the second round of the Stuttgart Open on Monday.

Florian Mayer, Rudolf Molleker and Mischa Zverev also won their first-round matches at the grass-court tournament.

Zverev next faces Roger Federer, who will play for the first time since March.

The fifth-seeded Philipp Kohlschreiber and seventh-seeded Milos Raonic were scheduled to play their opening matches on Tuesday.

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