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Having done the same in his semi-final against Taylor Fritz, Rublev showed grit and determination to do so again in the final, eventually winning 5-7 6-2 7-5.

Rublev become only the third player in the Open Era to have comeback wins in both the semi-final and final at Monte Carlo after Ivan Lendl (1988) and Ilie Nastase (1971).

Rune started the stronger of the two and forced a break in the sixth game of the first set with two delightful drop-shot winners, only for Rublev to break straight back in the next game.

After throwing away seven of eight break point chances in the first set, it was somewhat inevitable Rublev was unable to save a crucial one on his own serve with Rune at set point, sending a return long to hand the Dane the first frame.

This was Rune's sixth ATP Tour-level final, making him the fifth teenager to pass five since 2000.

Rublev seemed determined not to make the same mistake again as he immediately broke Rune's serve in the opening game of the second set, although he did pass up two chances for a double break before Rune levelled the set at 2-2.

The heat appeared to be affecting both players' service games in a high-octane encounter, but Rublev steadied himself before breaking again and then racing to another as he comfortably secured the second set.

As Rublev had done after dropping the opener, however, Rune responded defiantly and raced out to a 3-0 lead in the decider, but after missing a chance to go 5-1 up, he was broken back as Rublev came back to 4-4.

At 5-5, a tiring Rune twice hit the net with overhead smashes and then had a double fault at break point, leading to a crucial break for the Russian, who then served out the match to clinch the title.

"I know it's tough to lose a final, but you are too freaking young, man, and already have a Masters 1000 title, so give me one time to win it," Rublev joked with a smiling Rune at the trophy presentation.