Any joy for Ramos-Vinolas in set three?

Two sets went by in 45 minutes and Zverev is keen to get this tied up as soon as physically possible.

The German takes his opening service game to love.

10th seed Petra Kvitova is racing to victory against compatriot Kristyna Pliskova.

She has a second break in the second set and will serve for the match now.

Naomi Cavaday
BBC Sport tennis commentator

Zverev has barely been playing. He's absolutely flying. He might even go out and have a practice session afterwards.

Too good. Zverev sets up a set point opportunity on the Ramos-Vinolas serve and grabs it with a huge forehand deep into the corner.

Zverev pushes Ramos-Vinolas to the back of the court and the Spaniard's hopeful attempt at a lob travels long to leave the fourth seed two points from the set.

Ramos-Vinolas manages to get a big serve down the middle back in play, but Zverev powers down a forehand winner in reply to finish off another service game.

He's one game from the second set and the third round already looks inevitable.

Laura Robson
Former British number one on BBC Radio 5 Live Sports Extra

I want to know who the guy is in the box that kept standing up and fist-pumping at every single point won by Matteo Berrettini in the tie-break.

I've never seen him before but he's alive. He was absolutely living for every point!

An unforced error from Ramos-Vinolas, who slaps into the net from the baseline, and Zverev claims his second break of the second set.

He's simply a class or two above the Spaniard today.

This is a real struggle for Ramos-Vinolas.

A double fault hands Zverev two more break points.

A rare mis-hit from Zverev as he sends a smash long for 30-30.

That's as close a look-in as Ramos-Vinolas gets. Zverev laughs it off before delivering an ace and securing another hold.

Czech Petra Kvitova has broken early in the second set against compatriot Kristyna Pliskova.

She took the first set in a tie-break.

Ramos-Vinolas has no response at the moment. He's forced into another error and finds himself 2-0 down in the second set. A mountain to climb.

Zverev gets stuck into another Ramos-Vinolas serve. A backhand levels things at 15-15, before the German sets up two break points.

Alexander Zverev gets the second set started and there's no change in the direction of this match.

More quality serving, completed with an ace, seals a hold to love.

Naomi Cavaday
BBC Sport tennis commentator

That's what Zverev struggled with initially. He was playing five sets after five-sets. People were saying he needed to be more clinical.

He seems to have sorted that but it has taken a while for him to adapt in Slams. He has been winning best-of-three tournaments since he was a teenager.

Image source, Reuters

The all-Czech battle is going Petra Kvitova's way so far. The 10th seed has taken the first set against compatriot Kristyna Pliskova.

A couple of Zverev errors gives hope to the Spaniard, but Ramos-Vinolas strikes long and the first set disappears in the blink of an eye.

22 minutes, to be exact. Zverev means business.

Backhand. Forehand. Forehand. Winner. Winner. Winner. Three set points for Zverev on the Ramos-Vinolas serve.

Is there any way back for Ramos-Vinolas in this opening set?

It doesn't look like it. Zverev is hitting the ball clean and strutting around the court with real confidence. He takes another comfortable service game.

Back on Arthur Ashe, Zverev has claimed a second break and is in total control of the first set.

The world number four is dominating against Ramos-Vinolas and leads 4-1 after 17 minutes.