Koke said that Joao Felix was gaining his form following Atletico Madrid's 3-1 win over Villarreal.
Felix, returning from a lengthy injury spell, came off the bench and scored.
"Everyone can see what is expected of João, he's a young boy and he has lots of room for improvement," said Koke after the match.
"Many great players have had to adapt to Atlético and it's not easy, he's young. If he listens to the boss and his team-mates, he will be the player that everyone wants to see."
Diego Simeone went on to compliment Koke's versatility.
"He knows what we're looking for, a tactical condition that lots of players don't have and a pass that seems slow but he knows where he is.
"He can play on the right, in the middle. He and Saúl are the ones who can play in any position."