I've no problems with the audio
For the WO it's written that's it's Arno right elbow but tough to know if he has really a problem or if it's a way to leave early Tunis. He made the same in Rennes last year. His tendinitis is maybe painful
The elbow protection is maybe not enough now.
In the bulletin of the tournament http://www.tct.org.tn/bulletins/Bulletin-J2.pdf
a pic of arno and they stress that it was electrical on court even a little argue with the German.
I guess to retire with an injury he needs to visit the tournament doctor, so I hope there's nothing seriously wrong.