Mail Online."It's his attitude, it's not good for the team or the coach. My relationship with him wasn't very good."I picked him for a cup game against Nice but he got booked early on.
The ref told me at half time to warn Guendouzi: one more foul and you're off, but in the second half nothing changed."I was left with no choice but to sub him off.
When I did, he refused to shake my hand."Casoni believes Guendouzi can still be end up being a top player but added that he sometimes "talks too much"."He took his job seriously, his training was no problem, and his character is to always want to win," said Casoni."Sometimes when he talks it's good.
Read more on dailystar.co.uk