Arsène Wenger has explained the difficulties behind strengthening his squad during the January transfer window.

The Arsenal manager has been linked with a host of players this month, including prolific Napoli striker Edinson Cavani.

While Wenger is working hard on potential signings, he says there are obstacles to bolstering his team.

"We can spend money if it is for a player we think gives us a plus," he said.

"We can strengthen everywhere. You can come out of any game and think, ‘We gave some cheap goals away against Manchester City'. At the moment it is more important that the team remains focused. If we find something, we will do it.

"Listen, [with regards to] Cavani; Napoli are playing for the title and the Champions League in Italy. What is Napoli's interest in selling Cavani? None, unless you say, ‘OK, we will pay twice the price of what the player is worth'.

"On top of that, all the players who can strengthen us are cup-tied in the Champions League."

Wenger says he weighs up the extra spend against what he might lose by not qualifying for the Champions League, but is confident his squad will do it anyway.

"Even if you buy somebody, you have no guarantee that you will be in the top four," he said. "We want to be in the top four of course. That's the priority."

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Rob Kelly 18 Jan 2013