Sky Sports pundit Jamie Carragher says Arsenal should sign a striker and a defender before the end of the summer transfer window.
Goalkeeper Petr Cech is the only summer signing made so far by boss Arsene Wenger.
Reports have claimed that the North Londoners are about to offer more than £45m to sign striker Karim Benzema but Carragher believes that the defensive department should also be strengthened.
"Can Arsenal rely on only Theo Walcott, Olivier Giroud and Danny Welbeck up front? No," Carragher told Sky Sports.
"I think they need a striker in the mould of an Ian Wright, Thierry Henry or Nicolas Anelka type, who they have not quite got at the moment.
"And if you ask every Arsenal fan, then they would say they still want a world-class striker. But it is very difficult to get them, they all obviously play for the top clubs and we know that Wenger wants to get value for money, you can see that in the signing of Cech, who he has got for a great price.
"Are Arsenal strong enough defensively, especially in the centre of their back four, to win the league? Not really.
"I am a big fan of Laurent Koscielny and Per Mertesacker is a good player and a World Cup winner.
"You have those two and Gabriel Paulista, who they bought in January, but instead of signing Paulista, I would have liked to have seen them sign a top centre-back, so that the three of them are vying for two positions.
"As it still looks to be as though Koscielny and Mertesacker are first choice and there is no real danger of them losing their positions."