Rafael Nadal bulldozed his way into the quarter-finals of the Australian Open by beating Tomas Berdych on Sunday. Nadal's prospects of winning a second Australian Open title 10 years after his first are looking every rosier. The Spanish second seed was ruthless in the first two sets then saved a set point in the third in a 6-0, 6-1, 7-6 (7-5) victory. Nadal will take American Frances Tiafoe, who celebrated his 21st birthday by defeating Grigor Dimitrov 7-5, 7-6 (8-6), 6-7 (1-7), 7-5.