Rab can still be a Killie hit.
Nigerian Ibrahim failed to make the breakthrough at Celtic following his move from PSV Eindhoven 15 months ago.
But Dutchman Tesselaar -who knows Ibrahim from his days in Holland - insists he can still be a big star at Killie despite a slow start since his switch to Rugby Park on a free last summer.
He said: "Rabiu came on against St Mirren during the week and everyone can see he's a talent.
"He's doing well in training and I think he has a really big future in the game."