Arsenal hero Martin Keown says manager Arsene Wenger must get serious in the transfer market this summer.
The former Gunner is worried that his old club's ability to strengthen may be affected by the loss of Bacary Sagna and Thomas Vermaelen.
Keown told the London Evening Standard: "A lot depends on whether Sagna and Vermaelen stay. I think Arsenal would prefer to spend their money elsewhere but it will have to be spent to replace those two if they leave.
"Arsenal need a holding midfield player, either a long term successor to Mikael Arteta and Mathieu Flamini, or someone who is going to go straight in to the team. Olivier Giroud has carried the mantle of being the striker magnificently, scoring 23 goals, but he needs help. It is a big call to wait for Yaya Sanogo to be the No.1 striker for Arsenal.
"You need two international strikers, you have to put fear into the opposition - and give hope to team-mates. We just rolled it to Thierry Henry or Dennis Bergkamp and they did the rest."
