Tennis: Hip problem forces Sinner to retire in Madrid

(ANSA) - ROME, MAY 2 - Italy's world number two Jannik Sinner has pulled out of the Madrid Open at the quarter-final stage due to a painful hip problem.
    "Taking the advice from the doctors we decided it's best to not play further and make it worse," said the 22-year-old, who was aiming for his fourth title of the year.
    His withdrawal means that his quarter-final opponent Felix Auger-Aliassime has got a bye into the last four.
    The Australian Open champion is scheduled to take part in the Italian Open in Rome next week. (ANSA).