Former Manchester United striker Bebe has refused to rule out a return to Old Trafford.
The Portuguese forward joined United for £8m from Vitória de Guimarães in 2010 but failed to impress during his time in England.
The 25-year-old made just two league appearances for the club and was subsequently loaned out to several sides before being sold to Benfica in 2014.
“I’ve never thought about that [returning to Man United], but nothing is impossible,” he told Portuguese newspaper Publico.
“If I score 10 goals in La Liga then for sure, I’ll be able to sign for a big club. If I score 10 goals here at Rayo Vallecano I’m going to have many big teams chasing me again next year.”