Injuries to the spine, shoulder, knee and ankle are common.
With an eye to developing the future, coaches and medical staff are now using video analysis to identify these injuries.
A team that loses an important player or two will find it difficult to recover.
This article uses images from the game between Juventus and Roma in the 2014-15 UEFA Champions League.
The images are taken from a video analysis of the game by UEFA.
The image on the right is from the Juventus v Roma game.