So Single leg squats do help ?? According to Stack.com, it will Boost your power on Serves a great deal. I never thought doing single leg squat with no weights can make that much difference. How many Reps or squats per Rep ,,, should I do ?Be carefull with those anti inflammatory's and get off them as soon as possible. They have bad side effects including terrible dreams and blood pressure issues. Get some ice packs and ice gel to get rid of the pain.
Once the pain has subsided I would do an exercise where you roll up
A towel and put under your knee and then press on it for 3 seconds and release. Once you can do this then move on single leg gentle squats.
Please take care of yourself and be gentle.
Also 2 weeks of anti-inflammatory drugs don't really hurt anything. I know people who taken it for 5 month and nothing bad happened to them