The Brazilian keeper is on the transfer list after turning down the offer of a new deal in the summer and claims that he would be leaving Ashton Gate in January upset Johnson prior to the 3-2 defeat against The Blades.
"Unless someone is 100% behind what we're doing then they're not going to be involved," Johnson told BBC Radio Bristol.
"He decided through another vehicle to tell everyone that he was available in January.
"I asked him to not to come to the game as I didn't think he was going to be part of it, in his head as much as well as anything else.