Monaco, April 8 -- Jannik Sinner and Carlos Alcaraz continued their tussle for the world number one spot as they opened their clay-court seasons with commanding second-round wins at the Monte Carlo Masters.

Fresh from completing the 'Sunshine Double' without dropping a set, Sinner needed only 64 minutes to complete a 6-3 6-0 demolition of Frenchman Ugo Humbert - conceding just sixpoints in the second set.

It was an 18th successive Masters 1000 win for the Italian second seed, who has now won 36 consecutive sets at that level.

If Sinner goes all the way and wins in Monaco he will replace Alcaraz as the world number one when the rankings are updated on Monday, according to BBC sport.

Alcaraz, the defending champion, opened his clay-court ...