Sabalenka made quick work of Iatcenko in the second round, while Tiafoe, Tsitsipas, Pegula and Muchova were among the other notable winners

And Nakashima breaks too – he’s hitting it hard off both wings and I wonder if he’s in the process of finding a new level. The first few times I watched him, I thought he had a bit of something and, real talk, I thought he’d be better by now than he is. But I really like what I’m seeing from him and, as we know, progress isn’t always linear.

It’s a good start for Medvedev, Gorzy – who saved five match points in round one – tamely ceding serve to 15.

• German scrapes home 6-4, 3-6, 6-7 (7), 7-5, 6-4 in thriller

• ‘I think this is the longest first-round match I’ve played’

Alexander Zverev rallied just in time to avoid becoming the first men’s No 1 seed to lose in the first round of a grand slam tournament since 2003, edging Lorenzo Sonego 6-4, 3-6, 6-7 (7), 7-5, 6-4 in a US Open match that ended in the early hours of Wednesday morning.

Zverev could not cash in on repeated chances to break Sonego’s serve for much of the night and was in danger of becoming the first top-seeded man to fall in his first match in a major tournament since Ivo Karlovic beat Lleyton Hewitt at Wimbledon in 2003.