Jannik Sinner has withdrawn from the Madrid Open due to a hip injury ahead of his scheduled quarter-final clash with Felix Auger Aliassime.

The world number two was due to face Auger Aliassime for a place in the semi-finals after fighting back to overcome Karen Khachanov in three sets on Tuesday.

However, the Italian has been advised to withdraw to avoid aggravating an issue with his right hip, which he says has troubled him throughout the tournament. 

Sinner, who is 28-2 for the season and won his first grand slam title at the Australian Open earlier this year, wrote on X: "Very sad to have to withdraw from my next match here in Madrid. 

"My hip has been bothering me this week and has slowly been getting more painful. Taking the advice from the doctors, we decided it's best to not play further and make it worse."

Sinner's withdrawal means Auger Aliassime will advance to his first ATP Masters 1000 semi-final since 2022, with Daniil Medvedev or Jiri Lehecka – who eliminated Rafael Nadal on Tuesday – up next for the Canadian. 

On the other side of the draw, two-time defending champion Carlos Alcaraz suffered a surprise exit at the hands of Andrey Rublev on Wednesday, with the Russian set to face either Taylor Fritz or Francisco Cerundolo in the last four.