Why Cipolla did not shake hands with Wawrinka after losing in the US Open?

Question

Why Cipolla did not shake hands with Wawrinka after losing in the US Open?

Answer 1

Cipolla was apparently pissed off at Wawrinka for mocking him by limping and then walking normally. Wawrinka also did a fist pump when Cipolla double faulted. So when the match ended, Wawrinka asked Cipolla, "You don't want to shake my hand?" Cipolla replied "No of course not. I don't want to shake your hand"

In my opinion, Cipolla could've at least shook Wawrinka's hand. What a poor sport.  

Answer 2

its all on this website:

http://www.nj.com/sports/njsports/index....