Pella progresses at Stuttgart Open; Zverev to play Federer
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.