Despite his energy being able to force turnovers through his work rate, Duk is less effective in his direct defensive duels where he lacks some technical defensive quality at times.
I feel Tavsan could excel in a ball-dominant team and could well be a diamond in the rough for someone to pick up at a cheap price. If placed into a better side, I think his output would increase greatly.
Barrington is a fantastic identifier of space and this helps greatly with his ability to produce final third output regularly. The former Man City Youngster also works relatively hard off the ball and can contribute adequately when his team are out of possession.