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Bayern have been increasingly confident of retaining Alaba's services, though, and the player himself is focused only on Die Roten's bid for Champions League glory in Portugal this month.
"My focus is on the next few weeks and that's why I don't let anything else distract me," he said when asked about his future.
Alaba was part of the Bayern side that routed Chelsea 4-1 on Saturday to earn a 7-1 aggregate triumph in their last-16 tie, which was completed over five months after it started.
Next up is a quarter-final date with Barca, who were inspired by Lionel Messi in getting past Napoli and into the last eight.
Alaba acknowledges the competition is about to crank up a notch but says Bayern can approach the task with confidence.
"I think it will be even more intense in the next few weeks and that's why we want to prepare well in Portugal so that we're ready," he added.
"The anticipation is huge, of course. Barcelona have a good team, we are aware of that, with very good, individual players, but we want to counter that and go to Portugal with confidence. We need each other, we cannot hide."
Bayern finished their domestic campaign as Bundesliga champions, with Alaba featuring on 28 occasions, scoring one goal and assisting one more, as they won the league by 13 points ahead of second placed Borussia Dortmund.