Craig signed a pre-contract agreement with Hibs last month and St Johnstone rejected a bid to speed up the transfer.
Saints play at Easter Road on Monday but Fenlon does not expect Craig's involvement to be problematic for the player.
Fenlon said: "We have had an agreement and that's put by to the end of the season and come Monday night it's just about going out and playing the match.
"Footballers are used to that, they just get on with it, and I'm sure it will be the same on Monday.
"As a player you step on to the pitch and a lot of that stuff goes out of your head.
"You don't think a lot about other stuff when you go on the park, you think about winning the game and what the approach is from your team tactically.
"You don't have time to think about anything else."