Former Arsenal defender Martin Keown believes the signing of ex-Manchester United centre-half Mikael Silvestre is a great move by manager Arsene Wenger.

"Mikael Silvestre's arrival has also helped with both the youngsters' development and defensively solidarity. I have been impressed with the way he has wanted to lead and has shown great determination in sorting out the back line, attacking ball and showing the aggression they need," said Keown.

"People talk about needing height at the back but I was never that tall - it doesn't matter how tall you are, the guy who wants to win it most will do just that."