The midfielder clearly disapproved of Guidolin's decision and refused to shake his hand when he was replaced by Jefferson Montero.
However, Guidolin was less than impressed with the South Korean, and said the player had a bad attitude.
"This is not a good attitude and I will have to speak to him," Guidolin said.
"I respect all my players, but the relationship between them and me is very important.
"There is no problem with respect between me and the players; in this squad I have found good guys and good players".