Barton and Sibierski were team-mates at Manchester City. Sibierski said: 'Joey Barton is a really good player with great commitment but sometimes he can switch off very, very quickly.
Was Sam Worried About Barton Temperament?
'His strength is also his weakness because if you know you are going to play against a player like that and, if you are a little bit clever, you can provoke him. He is going to go mad and see red very quickly.'
As it happens, Big Sam dropped Barton. So did Wigan win the mind games?