Denis Shapovalov called for tennis officials to take a stronger stand against disruptive fans after he was heckled during his three-set win over local hope Lorenzo Sonego at the Italian Open on Monday.

Shapovalov lost his cool, was handed a point penalty and was booed by the fans but he overcame all those distractions to beat Italy's Sonego 7-6 (7-5), 3-6, 6-3 in his opening match in Rome.

The Canadian was given a point penalty after he climbed over the net to point out to the chair umpire the mark on his rival's side of the court, which is prohibited by the ATP rules.