Still only 6 injuries in 7 seven years and besides, there's a 20-month injury free period between the first and second groin and calf injuries. Hardly suffered them repeatedly. Wouldn't even consider Costa to be injury prone. What do I consider injury prone? The number of injuries suffered over the years/often picking up injuries - players like Carroll, Pato, Marin, Agger, Diaby etc. The severity of it can also be a factor.