The most ridiculous football injuries
Manchester City star Mario Balotelli had to be substituted during the Europa League tie after the Italian's face became swollen.
It seems that the striker has an allergy to certain types of grass.
"He had an allergy, I don't know what, his face was swollen, I don't know why," said his manager Roberto Mancini.
As strange as a footballer being allergic to grass sounds, Balotelli is far from alone in suffering a freak injury as this guide explains.