Mario joined West Ham on loan in the January from window from Inter Milan, and he has impressed since arriving.
The Portuguese attacking midfielder has added to West Ham’s attacking play, with his performances catching the eye.
There have now been suggestions that Mario could remain at the London Stadium on a permanent deal.
But the £24 million rated midfielder, as reported by Calcio Mercato, was very coy over his future when asked whether he would stay with West Ham.
He said: “For me it’s been an amazing experience. I want to say thank you to West Ham for everything they’ve done, my teammates, and my coaches.
“I’m really happy with the last six months and we will see what happens.”
Mario’s situation at West Ham is further complicated by the expected departure of David Moyes.
West Ham look likely to have a new manager in charge next term, and it remains to be seen whether he will want Mario to be a part of his squad.