Thanks for posting your query at ATD.
To understand your condition in a better way, kindly provide answers to the following questions.
What's your age group?
Do you have any preexisting knee disorder?
Is there any trauma preceding the pain or during playing the tennis?
Are there any other symptoms as well like swelling or locking of knee?
Which part of knee is painful- front or inner side or outer aspect or the back part (popliteal region)?
What treatment have you received so far?
Looking forward to your reply.
Feel free to ask your doubts.
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.