Arsenal legend George Graham is a big fan of Thomas Vermaelen.
Graham has been impressed by the Belgium defender.
"He's a real defender, class," Graham told the Sunday Mirror. "He has been a great signing. But there seems to be a lack of cohesion among the defenders.
"Maybe it is time for the philosophy of the club to change and allow Arsene to spend big.
"United have done it over the years. They wanted both Rio Ferdinand and Wayne Rooney. They had to pay over the odds, but they got them."