The 29-year-old, who arrived at the Emirates Stadium from Malaga for £16.5 million in 2012, has been strongly linked with a return to Spain despite having three years left on his current deal.
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"When the World Cup is over, I'll start thinking about my situation," he told reporters.
"I don't want to be thinking about it right now and I've told my agents not to tell me anything if an offer comes in.
"But I know a few of the Atletico players - [Diego] Godin, Juanfran - and I know the side well from when I was playing the Spanish league.
"But until the tournament is over, I won't know if the rumours are true or not."
Atletico will have money to spend when the expected sales of Diego Costa and Filipe Luis to Chelsea go through for a combined £55m.
Former Arsenal captain Cesc Fabregas has revealed that Arsene Wenger turned down the chance to re-sign him before completing his £28.4m move from Barcelona to Chelsea, stating: "Arsenal was my first option for the contract clause [but] we talked with Wenger and my position was filled in his team."