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Djokovic into ninth straight RG quarter-final
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Russian Khachanov had his chances, but the No.2 seed's fitness and self-belief saw him home. "I'm young, so I might as well stay on court and practise a little bit," Zverev said. "It's the best, a five-set match. I've been down 2-1 every single time but I'm unbelievably happy to be into the quarter-finals. All the hours in the gym have paid off."