But it is noticeable that when Cook is off the field Leeds lack attacking presence in the centre of the pitch.
The 18-year-old’s end product needs work but he is one of those midfielders who likes to run with the ball, goes past other players easily and opens up space in the pocket and out wide.
The likes of Liam Bridcutt, Luke Murphy and Tom Adeyemi can create a solid platform but Cook - and in his own way, Alex Mowatt - provides the impetus.
Evans needs him fresh and in form during the second half of the season.