Lionel Messi has been substituted at halftime of the first leg of the Supercopa de España, with Cesc Fabregas replacing him. FC Barcelona says that the star forward has a left thigh injury, but they are currently unaware of the severity. They are currently calling it a "left thigh contusion."
Messi ha sido sustituido por precaución por unas molestias en la parte posterior del muslo izquierdo provocadas por una contusión #fcblive— FC Barcelona (@FCBarcelona_es) August 21, 2013
Mañana se harán más pruebas a Messi #fcblive— FC Barcelona (@FCBarcelona_es) August 21, 2013
Provided there is not so much swelling in his thigh that an MRI is not possible, he should have a scan to determine the severity of his injury on Thursday.
Messi had to miss a good chunk of action last spring due to a recurring hamstring injury and was also held out of some Argentinian national team matches. The team did not specify which muscle Messi injured in his upper leg, so this may or may not be an aggravation of the same injury that he had previously.