The 14-time Grand Slam winner, who has been troubled by injuries in recent years, saved six set points in the second set before dominating the third and he had this to say after his victory.
The 14th time grandslam champion also revealed that he never thought he could make it to the semi-finals of the AUstralian open.
Nadal will next meet 15th seed Grigor Dimitrov on Friday after the Bulgarian beat David Goffin.
The Spaniard who is 30 years old, remains on course to meet Roger Federer in Sunday’s fina and is attempting to become the first man in the Open era to win each of the four Grand Slam titles twice.
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