Liverpool signed Joe Allen from Swansea for 15million last summer but was hindered by a shoulder injury in his maiden season for the Reds.
Rodgers now feels that Allen can shine this season now that he is back to full fitness again. Liverpool now have good depth with Henderson and Allen both wanting a starting berth in the Reds side.
He said: “In the first three month of last season Joe [Allen] was our best player by a mile but he had a problem with his shoulder which curtailed his season.
“It meant he could not have that aggressive streak which is part of his game.
“Joe has been terrific over the course of pre-season and he did very well [against Olympiacos].
“It is important we have a real strong competitive group as we are trying to build the depth of the group so that I can change the team in games and when we go to play against certain teams I can change the team about.”