Popsugar Health & Fitness Coco Gauff The Best Photos of Tennis Stars Coco Gauff and Caty McNally Coco Gauff and Caty McNally, Known as "McCoco," Could Be Headed For Their First Grand Slam 10 September 2021 by Amanda Prahl Image Source: Getty / Elsa Tennis stars Coco Gauff and Caty McNally are at the top of their game individually, but as a team, they're even more spectacular. The women's doubles pair has advanced to the semifinals of the US Open after defeating the top-seeded team of Su-Wei Hsieh and Elise Mertens on Aug. 8, part of a contingent of teens who have taken the tournament by storm. "Age is just a number; it doesn't mean anything," McNally, 19, said following their win. "We're showing that we're fierce and we're ready to be out here competing with everyone. I just think it's awesome." The teen sensations have been playing doubles together for a few years now, racking up three Women's Tennis Association (WTA) titles and repeatedly knocking on the door of a Grand Slam. With their incredible skills on the court — and a close-knit friendship helping to fuel their success — that first major could come any day now. "The main thing that makes us hard to beat is our chemistry with each other," said 17-year-old Gauff. "If one of us is off, the other one is always there to cover." One thing's for sure: they're fun to watch. Take a look back at some the team's best moments so far — including their playful, signature shoulder bump — in the slides ahead. Image Source: Getty / Mike Hewitt 1 / 20 Image Source: Getty / Clive Brunskill 2 / 20 Image Source: Getty / Matthew Stockman 3 / 20 Image Source: Getty / Elsa 4 / 20 Image Source: Getty / Elsa 5 / 20 Image Source: Getty / Elsa 6 / 20 Image Source: Getty / Elsa 7 / 20 Image Source: Getty / Greg Bowker 8 / 20 Image Source: Getty / Greg Bowker 9 / 20 Image Source: Getty / Darrian Traynor 10 / 20 Image Source: Getty / Darrian Traynor 11 / 20 Image Source: Getty / TPN 12 / 20 Image Source: Getty / TPN 13 / 20 Image Source: Getty / Jack Thomas 14 / 20 Image Source: Getty / Clive Brunskill/ 15 / 20 Image Source: Getty / Tim Clayton 16 / 20 Image Source: Getty / Tim Clayton - Corbis 17 / 20 Image Source: Getty / Tim Clayton 18 / 20 Image Source: Getty / Tim Clayton 19 / 20 Image Source: Getty / Tim Clayton 20 / 20 Coco GauffAthletesSportsUS OpenTennis