Rafael Nadal, overcame Belgium’s David Goffin in straight sets to reach the final of the Monte Carlo Masters.
Nadal fought back from a break down in the first set and went on to win 6-4 in controversial circumstances.
The chair umpire, Cedric Mourier, examined the wrong mark and incorrectly called a long Nadal shot in, which handed the momentum to the Spaniard.
The point appeared to have frustrated Goffin, who then lost 6-1 in the second set.
Nadal said after the match that he was “very happy to be in the final of such an important competition, the first of the season on clay”.
“I found a way to create some damage on David because at the beginning of the match he was dominating,” he added.
Compatriot, Albert Ramos-Vinolas, stands between him and his 10th Monaco Masters title in Sunday’s final.
“It will certainly be a tough final; Albert has beaten Andy Murray to be here so I will have to play my best to win. He is playing fantastic at the moment”.