Japan's Osaka defeats United States' Collins in straight sets to reach semis

Daniil Medvedev is one win away from returning to No. 1. And Naomi Osaka is two wins away from being a tournament champion again.

Shaking off a slow start, the top-seeded Medvedev reached the quarter-finals of the Miami Open on Tuesday by defeating Jenson Brooksby of the U.S. 7-5, 6-1.

Medvedev has yet to drop a set in his three Miami matches. He'll face No. 8 seed and defending Miami champion Hubert Hurkacz in the quarters — and if Medvedev prevails there, he'll be assured of supplanting Novak Djokovic and returning to No. 1 in the world.

The computer might say it for him soon enough. The Russian held the No. 1 ranking briefly, lost it to Djokovic again about a week ago and is now closing in on capturing it again.

Brooksby jumped out to an immediate lead, breaking Medvedev's first service game and wound up serving for the first set — two points away at 5-4, 30-15.

It was all Medvedev from there.

Covering every inch of the court? No big deal