Gauff says things I don't understand," Keys talks about her relationship with Gauff

Madison Keys and Coco Gauff will face off this Wednesday for a spot in the Roland-Garros semifinals. The two Americans know each other well since they come from the same country, though there remains a significant age gap.

Keys spoke about this during a press conference, in comments reported by Tennis Actu: "I remember meeting Coco for the first time—for me, she was 9 years old. She was so young.

She wasn’t even on the junior circuit yet. When I saw her, I immediately knew she was going to be a champion, a real gem.

I’ve always been impressed by how she handles the pressure, all while being so young.

I’ve always thought it was phenomenal. It was always fun to see her so accomplished at such a young age. Sometimes I feel very old when I talk to Coco because she says things I don’t understand.