Auger-Aliassime retires from Australian Open with injury

In an early result on the men's side, No. 7 seed Felix Auger-Aliassime retired in his match with Nuno Borges of Portugal. Borges led 3-6, 6-4, 6-4 after just over two hours when the 25-year-old walked to the net to shake hands.

"I'm OK, but I just started cramping at the start of the third set," the Canadian said. "Yeah, it became very difficult to be competitive at this level. I tried for a set, but yeah, wasn’t possible today."

In other men's first round matches No. 11 seed Daniil Medvedev beat Jesper de Jong 7-5, 6-2, 7-6 (2) and No. 19 seed Tommy Paul defeated Aleksandar Kovacevic 6-4, 6-3, 6-3 in an all-American match.