Over on the Grandstand court, Aussie Ellen Perez and her doubles partner Nicole Melichar-Martinez are poised to advance through to the quarter-finals of the women's doubles draw. They took the first set against Beatriz Haddad Maia and Anna Danilina 6-3, and they're up a break at 5-3 in the second. They'll shortly have a chance to serve to win the match. Frenchman Corentin Moutet was given a warning for a time violation in the dying stages of his loss to Casper Ruud. As he battled to stay in the match, Moutet was standing at the back of the court wiping himself down well beyond the expiry of the serve clock as Ruud waited down the other end to serve. The Chair umpire gave the warning, before Moutet blew up. "Every time, every single time," he said. And it continued in the sit-down between games. "I am playing tennis. I am sweating. I am not sitting on the side in the chair waiting. I am playing tennis. " It's a warm afternoon in New York - temperatures are in the low-30s with humidity around 50 per cent.  Moutet continued muttering to himself as Ruud held serve to win the clash 6-1, 6-2, 6-7 (4-7), 6-2 to book his ticked to the quarter finals. Teen American star Coco Gauff delivered a massive rap for Nick Kyrgios after advancing to the round of 16 at the US Open, revealing her friendly experiences with the Australian and challenging his reputation as a "bad guy". Gauff had glowing words for the former world No. 13 after defeating compatriot Madison Keys 6-2, 6-3 in the third round at Flushing Meadows. The tournament's 12th seed cast her memory back to a couple of occasions in her early teens when Kyrgios stuck around after training to help her with her game. "I know there's things on the court that he does that people don't agree with. I probably don't agree with some things," Gauff said. "But it's just things like (hitting with a young kid) that stands out for me. "That's why I feel like I can never dislike him . . . because constantly when I see him around, he's always saying hello. "It's just moments like that that people don't really see about him. So I think people paint him as a bad guy. I feel around the grounds, at least my experience of him, he's not. " Gauff and Kyrgios are now set to share Arthur Ashe Stadium in the fourth round, with the 18-year-old awaiting a clash with China's Zhang Shuai and the 27-year-old zeroing in on a match against top seed Daniil Medvedev. Kyrgios overcame American J. J. Wolf 6-4, 6-2, 6-3 in the third round. "I think in the end it helped me in the long run as a player hitting with him," Gauff added. "He told me good things about my game. At that time I'm like, 'Nick Kyrgios thinks I'm a good player'. You start to believe that and gain confidence in that. " Kyrgios teamed up with great mate Thanasi Kokkinakis to conquer doubles at this year's Australian Open , but he's still pursuing his maiden singles major title. He went tantalisingly close to breaking through at this year's edition of Wimbledon, losing to Novak Djokovic in four sets in the final . History is on Kyrgios' side on the cusp of his match against Medvedev, with the head-to-head record 3-1 in the Canberran's favour. "If he keeps it up, I think he can go far. He can win the tournament," Gauf said. "We all know he has the ability to. "He was close at Wimbledon. "I always, always root for him, no matter who he's playing, to be honest. " Hello and welcome to Wide World of Sports' live blog of day seven of the US Open. Enjoy the team's coverage as a long list of stars chase glory at the New York major. .