Madrid: Frenchman Jo-Wilfried Tsonga on Wednesday retired from the Madrid Open due to a problem in his shoulder, which means Spain's David Ferrer entered directly to the round of 16.
Ferrer will face the winner of the match between the Argentine Diego Schwartzman and Japanese Kei Nishikori, reports Efe.
Tsonga, who reached the quarter-finals of the Madrid Open in 2013, said he felt a pain last week while training and then again at the end of the match against Andrey Kuznetsov.
He acknowledged that he does not want to take risks because there are other tennis tournaments in the coming weeks.
-IANS