World No.9 Madison Keys is into the semifinals of the Olympic tennis event in Rio on her debut appearance. Earlier this week, the American sat down with the New York Times to discuss her beauty and health regimen and how she keeps it up despite traveling the world week in and week out.

For Keys, who is constantly under the sun, skin care is the most important thing:

The first thing I put on is sunscreen. I do it within 15 minutes of waking up so I’m protected by the time I’m out the door.

I use moisturizer only at night — Philosophy Hope in a Jar. Two or three times a week, I do a Caudalíe face mask. It’s a purifying one because I have combination skin, and I’m sweating so often. It can be really tough to keep clear skin, especially if you’re wearing a visor. It’s just sitting on your head, and you break out underneath it. It can be a disaster.

And here’s her sage approach to diet and exercise:

“I have to eat pretty healthy to stay in shape, but a big part of my diet is having that occasional dessert. My favorite is Ben & Jerry’s Half Baked ice cream. But I have to watch it. I’m lactose intolerant, so sometimes I’ll do the Ben & Jerry’s lactose-free line.

For a tennis player, the toughest part of training is the off-season. That’s when we’re doing tons of tough fitness — maybe two to three hours in the gym. Obviously as you get closer to the tournaments, you spend more time on the court. Right now, I’m spending two and a half to three hours on the court every day.”

Check out her New York Times feature to hear what the Olympic semifinalist has to say about hair care, her go-to makeup, acupuncture and more.