CMats Hummels was reminded of the responsibilities being a Germany international this week after his pool-jumping stunt. The panic-stricken federation hastily decided to send the wrestlers to Paris 17 days before the world championship began. Hitting winners and unforced errors in almost equal measure in the opening set, the former world number one dug deep to take the advantage. Sloane is making a comeback after recovering from left foot surgery and is back in the fourth round for the first time since 2013. US Open 2017: Garbine Muguruza sets up clash with Petra Kvitova. US Open 2017: Diego Schwartzman upsets Marin Cilic to reach fourth round. But it was all sweat in a rough start for the former world number one as she made nine unforced errors in the first three games. Monday, Kvitova has played very much like a grand slam champion, crushing another Frenchwoman Alize Cornet 6-1 6-2. In a meeting with the sports ministry after the Games, the federation said Mestvirishvili had ‘outlived his usefulness’ and had to be replaced. Serena Williams has not competed since winning the Australian Open in January.