Iran Press/Europe: The Spaniard was in danger of being thrashed when Rublev led by a break in the second set, having dominated the opener, but showed his trademark grit to battle back.
Rublev was unrelenting, however, and bludgeoned his way into a 5-1 lead in the second set after break the Nadal serve three times. Nadal held serve but the 23-year-old world number eight then finished it off with a crushing forehand winner.
It was Rublev's first win against Nadal and the first time had managed to win a set.
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