Home favourite Bernard Tomic battled through to a meeting with Roger Federer after outlasting Alexandr Dolgopolov at the Australian Open.
Tomic triumphed 4-6 7-6 (7/0) 7-6 (8/6) 2-6 6-3 in the third-round clash on Friday.
The Ukrainian had the edge early on in an absorbing match which featured two players with an unconventional style.
But the match swung the Australian's way in two tie-breaks and although Dolgopolov hit back to take it all the way Tomic proved the more consistent in the decider.
Meanwhile, former US Open champion Juan Martin del Potro overcame Taiwan's Lu Yen-hsun to reach the fourth round.
The Argentinian world number 11 beat Lu 6-2 6-3 6-0 to equal his best grand slam performance since lifting the US title in 2009.
Del Potro comfortably powered past the 79th-ranked Lu, who shocked David Nalbandian in Melbourne in 2009 and claimed Andy Murray's scalp at the 2008 Beijing Olympics.
The return to form of Del Potro comes having missed much of 2010 with a serious wrist surgery and the Argentinian now needs to beat Germany's Philipp Kohlschreiber to equal his best result in Melbourne, the quarter-finals in 2009.
