Inter Milan midfielder Patrick Vieira is backing Denilson to establish himself in Arsenal's midfield.
The former Gunners captain said: "He's a wonderful player. It's not going to be easy for him because Flamini was a good player.
"We need to give him more time to develop as a player but he can be one of the best players at the club. The more he plays the better he will be.
"He is young and has so many qualities and he's only in his first years of playing in the Premier League.
"He and Fabregas can play together, all the good players can play together."