Monte Carlo Masters: Sinner toils hard to enter quarters; Ruud stunned
IMAGE: Jack Sinner clinched a hard-fought win to enter the quarterfinals. Photograph: Clive Brunskill/Getty Image
Jannik Sinner was made to toil by Hubert Hurkacz as the Italian seventh seed saved a matchpoint to seal a 3-6 7-6(6) 6-1…