If it helps, the setting of this is a medieval era in another world, he recieves no medical attention until the following morning, and the person he fought with at the time was a strong-built male around 40 years old.
My questions are:
1. What sort of an injury would my character be likely to recieve? (I've been thinking perhaps tendon/joint damage, but I'm unsure).
2. How long would it take for him to recover both the first time around, and the times when the injury bothers him later on?
I've searched things like 'old injuries' 'tendon damage' 'injuries affecting walking' 'old hip injuries' amongst other variations (admittedly quite cautiously as I am not good with unpleasant pictures).