By the midway point of his second season at the Vitality Stadium, however, Cherries fans are still yet to see why Leeds supporters believed Cook was one of the most talented young midfielders in English football.
Injury ruined his first season on the South Coast. And while there have been some shoots of recovery this season, Cook was even awarded a maiden England call-up in Gareth Southgate’s experimental squad for the clashes with Germany and Brazil, the 20-year-old still appears to be performing well below expectations.
And there was no shortage of fans questioning his inclusion after Bournemouth were dismantled 4-0 at home by a Philippe Coutinho-inspired Liverpool on Sunday afternoon. Cook struggled from the off and lost possession on countless occasions.
There’s an argument to be made, then, that perhaps the Premier League came too soon. Like fellow Leeds graduate Sam Byram, who still finds himself out of favour at West Ham, Cook got his big break very early with just a smattering of first-team appearances under his belt.
Any Leeds fans watching on would have struggled to recognise a nervous and error-ridden performance on their one-time wonderkid.
Lewis Cook was truly horrendous today. I thought he was supposed to be the saviour? #afcb— Ryan Kingham (@Kingers_19) December 17, 2017
Lewis Cook comfortably the worst footballer on this pitch tonight. Ibe is worse, but I refuse to admit he’s a footballer. #afcb— Sam Somers (@SamSomers_) December 17, 2017
Have watched an hour of this and have honestly not seen Lewis Cook’s face once. #afcb— HUNTSPILL (@JimmyHuntspill) December 17, 2017
Lewis Cook maybe one for the future, but so far today, he’s had an absolute stinker. #afcb— Gareth Davies (@garphied) December 17, 2017
#afcb I can take losing, it's showing a distinct lack of effort that grinds my gears. Roll call for lack of effort: Smith, Franno, Ibe, Pugh, King. Poor Mr Cook looked lost as well. Lots of work required to turn this ship around.— Longy (@paulwarsash) December 17, 2017