Dont self-diagnose injuries on the internet as you're 99.9% likely to be wrong.
Tonight, I was lucky enough to been seen by my ex-brother-in-law who is actually one of the Physios on the Ars*nal back-room staff.
After a quick examination and manipulation of the knee, he confirmed there was no damage to the knee and the pain was very much typical behaviour of tendonitis of the patella tendon. Typical behaviour as it would hurt during exercise but it would be bloody sore afterwards.
So, its a case of dosing up on Ibuprofen until it settles down and I've got some exercises to do to strengthen the quads which will take pressure off the patella.
Oh...and now I'm taped up too, to further reduce the pressure on the tendon...
|Oooh, taped up like a footballer ;)|
Fingers crossed the tendon settles down ASAP.