There are two sides to Diego Costa. He is the clinical striker who scored 52 goals in 89 Premier League games for Chelsea.
Wolves are yet to see that version of him but, on occasion against Brentford, there were promising signs that he could become the goalscorer they desperately need.
He caused Brentford problems, tried to link with his team-mates and tested goalkeeper David Raya.
Then the other side of Costa came out. In the 97th minute, he head-butted Brentford defender Ben Mee. It was senseless, but perhaps not surprising.
Costa had a reputation for lashing out at Chelsea, though the absence of VAR meant he was never sent off.
Now there is no getting away with off-the-ball offences.
'Diego has apologised,' said Wolves caretaker boss Steve Davis. 'We have procedures in place to discipline him, but when emotions are high it's difficult to discuss those things. We'll have a chat together next week.'
Costa will not play again until after the World Cup. The striker, who is yet to score for Wolves, was just starting to build up his fitness and there were times against Brentford when he looked dangerous.
It makes his decision to lash out even more frustrating. While the red card did not cost his team the game, his three-match suspension leaves them even lighter in attack.
'The red card is a shame because we were just starting to see what he could do,' Davis said.
'He's getting better. It's taken him a long time, he hasn't played for a while, his fitness is important. It's not just that, it's match sharpness, it's technique and all the things that need to go with the fitness.
He led the line well. We know what he is now, we know what he's going to be.
'He plays on the edge, so there's always that player there that's bubbling away and I thought he gave them some problems.
'He had a good chance in the second half, he had some good chances throughout the game.'
