Juan Martin del Potro withdraws from Madrid Masters

Argentinian player Juan Martin del Potro has officially withdrawn from the Madrid Masters, the organisers have confirmed.

Del Potro has been suffering from a viral infection which has kept him out of this week's Estoril tournament and he will not recover in time for next week's competition.

A statement on the tournament's website said: "The current world number seven is not able to play in the Estoril tournament this week in Portugal, and due to a virus, he will not be fit to play in the Mutua Madrid Open. We wish him a fast recovery."

Del Potro reached the semi-finals last year, where he was beaten by Tomas Berdych.