Fabbrini was brought to the Blues in January, but he has not made a start for the club since signing permanently.
Toral’s form has kept him out of the team, but Rowett has suggested that he is now working on a system which includes both the attacking midfielders.
“I was tempted to start Diego but I think Jon has done so well for us that he might just have to be patient and wait - possibly until the next game," he said.
“With him and Jon being such good players it might be that we try to get them both on the pitch together in the next game.”
Birmingham lacked creativity in their last match against Rotherham United, as they drew 0-0 at the New York Stadium.
Rowett’s side struggled to break down the Millers, and that could be the reason behind the intended tactical change against Bolton.
Given the Trotters’ struggles this term, the onus will be on Birmingham to play on the front-foot as they look to pick up the three points in front of their own fans at St. Andrews.
If Birmingham can beat Bolton they could move back into the play offs, but a defeat would extend their winless run to four matches and see them fall further away from the top six.