Can composure be trained? Yes and no.
Maupay only spasmodically showed composure in front of goal. In spite of Potter's skills, he couldn't help Maupay enough to maintain the levels the club and team required.
For me, this is what composure looks like. Fast forward to 08:25...
That sounds an interesting test. Imagine the successful outcome, and then execute it. Success, even though it is in your mind, breeds success.
I know that golfers imagine a line from the ball to the pin all the time. I assume the most successful goalscorers do something similar.
I see Maupay has just missed a good chance for Everton against Liverpool. I heard the pundit say 'he lacked composure'.
We hear this term all the time. 'He lacked composure' when a player misses, and 'He showed great composure' when he scores.
We never hear 'he showed great composure and put...