Bulgarian Grigor Dimitrov kept his cool in the rod laver arena maelstrom to knock home favourite nick Kyrgios out of the Australian open in a fourth-round thriller.

Third seed Dimitrov absorbed 76 winners and struck 64 of his own to edge a scintillating duel 7-6 7-6 4-6 7-6.

Kyrgios fought until the end, breaking back when Dimitrov served for the match at 5-3 in the fourth set but Dimitrov booked a quarter-final spot in the night’s third tiebreak when he fired a sublime forehand winner.

Dimitrov will play British player Kyle Edmund for a place in his second successive semi-final in Melbourne.
In women’s tennis, fourth seed Elina Svitolina eased into the quarter-finals of the Australian open with a comprehensive victory over Denisa Allertova of the Czech Republic.

The Ukrainian made short work of a match that did not start until nearly midnight, taking just 57 minutes to beat her opponent 6-3 6-0.