A bruise or contusion forms when small blood vessels under the skin break ... from direct blows to the knee area involving something blunt. This may occur due to a fall or when a person bangs ...

An awkward fall while running, skiing or playing sports can cause knee injuries that sideline players and increase t ...

In the past, it's been his wrist that causes issues, but this time the recent US Open finalist took a tumble and hurt his knee. Facing No. 13 seed Borna Coric, Del Potro retired after dropping ...