Cook has helped Chesterfield to an unbeaten start to the season, winning four and drawing one of their opening five games this term.

The run has helped the Spireites establish themselves as early leaders of the League Two table having beaten promotion rivals Southend and Portsmouth in the opening five games of the season.

Summer signing Roberts has been inspirational in the unbeaten record netting three goals in the opening month.

Cook has been delighted with the form of Roberts and admits he has been key to their fine start to the season.

"Gary has worked really hard at the start of this campaign and that has been reflected in our results so far." said Cook.