If he retired at set point, the set was not completed, so what you say about him fixing matches is a load of crap.
It must be a bad injury.
Maybe he placed bets on HIM on odds or sets, but after IANNI got the setpoint, he didn't want to lose money.
It is fuc*ing joke to retire on setpoint. We are seeing so many matches in which so many players are fighting till the last breath.
I was playing a match the other day and right before match point my opponent had a really severe leg cramp. He ended up walking around and crap for literally 2 minutes and I thought he might quit. He ended up finally hitting a huge serve but I won the point later on an easy unforced error from him.
Andreev - Cilic - Dolgopolov - De Bakker - Djokovic - Gulbis - Haase - Hrbaty - J Johansson - Kucera - Kuznetsov - Russell - Simon - Sweeting - Thron