Patellofemoral pain syndrome (PFPS)
Also known as “runner’s knee,” PFPS is a common overuse injury that affects the kneecap and the area surrounding it. It can be caused by repetitive movements, such as jumping and twisting while playing tennis.

Meniscus tears
The meniscus is a piece of cartilage that provides cushioning between the bones in your knee joint. Meniscus tears can occur during sudden, twisting movements while playing tennis.

Anterior cruciate ligament (ACL) injuries
The ACL is a ligament that helps stabilise your knee joint. There are of course many instances throughout a tennis match where a player will make sudden stops or abrupt changes of direction to get to the ball. These movements have the potential to cause an ACL injury.

IT (iliotibial) band syndrome
The IT band is a thick band of tissue that runs along the outside of your thigh, from your hip to your knee. IT band syndrome can occur when this tissue becomes inflamed and irritated due to repetitive movements, such as running and jumping for the ball in a tennis match.

Flare-up of existing knee arthritis
Playing tennis can potentially flare up pre-existing knee arthritis. Tennis involves a lot of repetitive motions, sudden stops, and changes in direction, which can put stress on the knee joints. This can cause pain, swelling, and inflammation in the joints, particularly if there is pre-existing arthritis or other joint-related conditions.