Wigan coach Shaun Wane criticised Sam Tomkins, who was sin-binned during their 48-18 demolition of London Broncos.
Tomkins left the field for 10 minutes on his comeback from a shoulder injury after disputing a call made by referee Robert Hicks and his officials.
Wane said: "That was the wrong call from the in-touch judge but that is no excuse and it won't happen again.
"It was the wrong call but that happens in games, the referees make mistakes just like players.
"They are incidents for me to sort out in the week and not for Sam to do it on the field.
"He is a competitor, I understand he wants to win but he just cannot do that. I don't know what he said to the referee but it must have been severe for him to sin-bin him."
London coach Tony Rea was pleased with his team's first half performance, as they trailed by just four points at the break.
However, they failed to add anymore in the second period and Rea said: "You don't get points for playing well in the first half.
"We had to get out and do the same in the second half and we didn't do that.
"We have had a bad few days and the players have been a bit down but not on each other.
"They will be okay, we will all keep pulling in the right direction and we will have our moments."