Australian Open: Rafael Nadal sets up vintage final with Roger Federer after epic five-set win over Grigor Dimitrov

Rafael Nadal and Roger Federer will go head to head in a vintage Australian Open final after the Spaniard sealed an epic five-set victory over Grigor Dimitrov.

Nadal triumphed 6-3 5-7 7-6 (7/5) 6-7 (4/7) 6-4 after just short of five hours on Rod Laver Arena and will now face Federer, his greatest rival, in a mouth-watering showdown on Sunday.

Dimitrov threatened to derail Melbourne's dream reunion by twice coming from behind to force a decider, but Nadal was relentless, powering his way through to his 21st major final and first since winning at Roland Garros in 2014.

It's the first time the rivals will face off in a Grand Slam final in six years - with their last major final meeting seeing Nadal win his sixth French Open title in 2011.

Federer also progressed to the final in five sets, with the 17-time Grand Slam winner beating Swiss compatriot Stan Wawrinka on Thursday.