Arsenal legend Robert Pires has questioned the physical quality of the current squad.
Pires is currently playing in the Hero Indian Super League.
Asked if Arsenal could win the Premier League title this season, Pires told Press Association Sport: "It's very difficult.
"The current squad lacks the physical power the Invincibles team had in players like Sol Campbell, (Patrick) Vieira, Gilberto Silva and Thierry Henry.
"But in football, everything is possible. They have (the points gap) with Chelsea, but we can still win the league."
