(CNN) -- Defending champion Rafael Nadal has been passed fit to take on American Mardy Fish in the Wimbledon men's singles quarterfinals on Wednesday. Top seed Nadal was a doubt to face Fish after being troubled with an injury to his left foot during Monday's last 16 win over Juan Martin del Potro. However, the 25-year-old has now been given the all-clear to play after scans revealed the injury was not serious. Nadal posted a message to his fans on his Facebook page, saying: "After the match I went to take an MRI at a London hospital. "During the match I thought I had something serious -- but as the match went on the pain got better and thankfully the tests don't show an injury.
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Rafael Nadal is fit to face Mardy Fish in Wednesday's Wimbledon men's quarterfinals
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Nadal suffered a foot injury during his last 16 victory over Juan Martin del Potro
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But a scan on his foot revealed the injury was not as bad as first feared
Nadal's message is in stark contrast to his mood after defeating @placeholder in a hard-fought four-hour marathon played in blistering conditions.