Real Sociedad winger Adnan Januzaj won't rule out a return to Manchester United.

Januzaj faces his old club in the Europa League on Thursday night.

United inserted a buy-back clause into Januzaj's contract with Sociedad, which expires next year, and the club failed to sign an established right winger last summer.

"I don't know," he told the Manchester Evening News. "Football is football, anything can happen. I'm in the best moment of my career, I'm enjoying my football here, and then whatever will come for me, we will see.

"I'm really happy here for the moment, I have still one more year left of my contract here, so a lot of things could happen, if I stay or if I go, but for the moment I'm really happy to stay here and I'm happy here, so it's the most important for me."