Novak Djokovic breezes past Diego Schwartzman into the quarter-finals with a 6-3, 6-4, 6-4 win over the Argentine on Rod Laver Arena. Djokovic had little trouble dispatching Schwartzman in a match which lasted little over two hours. Schwartzman struggled to keep up with the Serb's relentless tempo which has put him into the quarters for the 11th time in his career. Djokovic will play Milos Raonic, who put on a serving masterclass to beat Cilic in straight sets earlier in the day, next. "It's a fourth round of a grand slam and Diego is a great quality player," Djokovic said post-match. "He's had a terrific tournament in the first three rounds, not dropping a set, and has played really well. "I knew if I came him time he could do a lot of damage at the back of the court. "He's one of the quickest players on the tour and I try to mix it up and it worked really well. " Milos is one of the strongest, tallest men in the tour and I have to be ready for missiles coming from his side of the net!"