Deulofeu was snapped up by Everton during the summer transfer window, and he was keen to stress to his teammates that he had improved from his last spell.
Deulofeu spent the 2013/14 season on loan from Everton, where he impressed going forward, but showed vulnerability when the Toffees were put on the back foot.
However, the Spaniard has shown his willingness to graft this time around, and Coleman has been impressed by his influence.
“Geri had to improve defensively - because I’ll shout at him if he doesn’t get back!” Coleman joked. “In all seriousness, he is a great lad and is so willing to help out defensively.
“When he came back he actually told me that he would be better defensively this season. When it comes to the right hand side, it’s just a case of the two of us having a good partnership.
“At the moment, when I get the ball I just give it to Geri because he is playing unbelievably. I think he is a better player now than the one he was two years ago. He has added so much more to his game, which is a credit to him.
Deulofeu has been one of Everton’s best performers to date this campaign, and he has fully established his place in their starting line-up.
The skillful right winger has destroyed defences across the league, and laid on chances a plenty for his Everton teammates.
Deulofeu’s form has been a major reason behind Roberto Martinez’s side’s good start, which has seen them climb up to seventh place in the Premier League table.