Youzhny has no adequate enough excuses for this retirement. Yes, I'm not blind, he was struggling, all through the match, but as soon as he starts to lose, he quits?
I don't know about you, but that's poor form. Could he have finished the match without damaging himself further? Should he have finished the match? Yes to both. I think this says a lot about Youzhny's current mental state, the fight is not there anymore and as soon as something, a little niggle perhaps, starts to bother him, he quits. A shame, but all tennis players make mistakes and this is yet another one.
Thiemo played intelligent tennis at the end of the second set and beginning of the third, and demonstrated his variety and great hand skills with some nice volleys and a lot of accurate backhands. He deserved to win this match, without an opponent retiring to tarnish it, somewhat.