Japan’s Naomi Osaka progressed to the quarter-finals of the US Open on Sunday night with a straight sets 6-3, 6-4 win over 14th seeded Estonian Anett Kontaveit at Flushing Meadows. Two-time grand slam winner powered through in the late match in an empty Arthur Ashe Stadium. The 2018 US Open champion said keeping her emotions in check was key to dominating the one hour, 12 minute-match. “For me it’s very important because it’s quite easy to get down on yourself, especially when you feel like you could have converted so many times,” she explained. Novak Djokovic apologises after being disqualified for hitting line judge “But I just told myself that she’s a great player she’s supposed to hold her serve so yeah just keep pushing.” Frustration had got the better of Osaka in the previous round when she threw her racquet during a tie-break. On her sixth match point, @naomiosaka gets the job done and is through to the final 8 #USOpen pic.twitter.com/BntchqKIvi — US Open Tennis (@usopen) September 7, 2020 Osaka said she hadn’t watched live the incident with Novak Djokovic earlier in the day when he was disqualified for accidentally hitting a lines judge with his ball after losing a game. She was sleeping ahead of her night match, but after becoming aware of it she said it served as a reminder to remain in control while on the court. “That’s definitely like a warning to never do that,” Osaka said. Kontaveit fought hard to hang in the contest, saving five match points before Osaka booked her place in the last eight. Japan’s Osaka will play 27-year-old Shelby Rogers for a place in the semi-finals after the American upset sixth seed Petra Kvitova in three sets Sunday. Osaka, of Haitian and Japanese heritage, walked onto the court wearing a facemask emblazoned with the name of Trayvon Martin, an unarmed black youth shot and killed by a white neighborhood watch member in Florida in 2012. Osaka, the 2019 Australian Open champion, is wearing different masks honoring victims of racial injustice and police brutality throughout the tournament. She has already donned face coverings bearing the names of Breonna Taylor, Elijah McClain and Ahmaud Arbery.