Tiafoe: "I'm tough as nails".

Frances Tiafoe has risen from the ashes. After a very tricky first half of the season, the American is on the road to recovery.

A magnificent finalist in Cincinnati, Tiafoe has followed this up perfectly in New York.

Having qualified for the quarter-finals, where he will face Grigor Dimitrov this evening, the 26-year-old was kind enough to confide in us about this wonderful comeback.

With a smile on his face, he explained: "This game is merciless, and you can't start to feel comfortable in it, otherwise it's going to be shaky.

You mustn't think you've got all the answers. This sport will test you. But I'm tough, and I can turn things around very quickly when I give it 100%.

You have to make tough decisions, and you also have to be very well surrounded. My family, my friends and my agents helped me make these decisions so that I could find my way back.

We had the tough conversations we needed to have, even when I didn't feel like it.

In the end, everything happens when it's time, and I'm delighted that it's here (US Open) because it's the most important tournament for me. "