i missed the part where you are a veteran pro footballer
left knee quadriceps tendons are a acting a bit whiny. Last week i was talking to someone for 40 mins in the cold after training, a point on wich the tendons cramp up a bit, and i jumped on my bike and set power with the left leg, resulting in a bit of pain under the kneecap.
its a small inconveniance since then, but the huge load on the squat is slowing its healing. One houre ago, i spend 20mins with the knees compressed (dont ask what i was doing), and when i stood up, it started hurting a bit.
Usually a sign of a lingering quadriceps tendinitis. But since my meet is in 3 weeks, cant pussy out and lower weights now, so icepacks in the evening and anti inflammatory agents have to keep it going untill then