"I know a lot about Simon and I've known him for a long, long time," Coleman said to The Mirror.
"We played in the Swansea schoolboys side together and he was a very good player. We came through together and his wife, Emma, went to my school.
"But on the football side, Barnsley will be coming here going for at least a point, and if they pinch a win it will put them in a very strong position.
"This is an important game for Coventry, too. We've got to end our poor run before the end of the season.
"I've told my players, when we were down at the bottom fighting last year, nobody showed us any mercy - and we should be the same.
"Finishing the season well is all I care about now."