QPR fullback Armand Traore rates Alex Song as Arsenal's most influential player.

The left-back makes his first return to the Emirates Stadium with QPR tomorrow since his summer transfer.

Robin van Persie is enjoying a record-breaking year, but Traore said: "I think we will have to be careful of their unsung hero Alex Song as well. He makes the team for them and is a really, really good player. It's going to be a very difficult game."