John Collins revealed that Ronny Deila and Leigh Griffiths warned him . The Celtic striker took a while to settle in at his new club after his move . Griffiths has been in red-hot form and scored three against Kilmarnock .
Leigh Griffiths revealed that Ronny Deila and John Collins warned him . The Celtic striker took a while to settle in at his new club after his move . Griffiths has been in red-hot form and scored three against Kilmarnock .