Spain's Carreno Busta books fourth round spot

Melbourne - Spanish 10th seed Pablo Carreno Busta reached the round of 16 for the first time at the Australian Open with a four-set victory over Gilles Muller on Friday. 

Carreno Busta, a semi-finalist at last year's US Open, won 7-6 (7/4), 4-6, 7-5, 7-5 in a 3h 18min match played out in the heat of the day on Margaret Court Arena. 

The Spaniard, who won the exhibition Kooyong Classic event in Melbourne last week, will face either Croatia's sixth seed Marin Cilic or American Ryan Harrison in Sunday's fourth round. 

In a tight contest, Carreno Busta broke Muller's left-handed serve twice and lost his just once along with 48 winners and just 22 unforced errors. 

It was Carreno Busta's third win over the 28th-ranked Muller in as many meetings.