Just 12 months after joining Boro in a £1.75million deal, reports have claimed he is wanted back at The Stadium of Light in a £5million transfer.
But the Argentinian midfielder, whose goal secured a 2-2 draw with Newcastle on Sunday, is ignoring the speculation.
"It is all rumours, I know as much as them," said Arca.
"No-one has contacted me, so from my point of view, it is all rumours.
"I will be delighted to stay here, but I cannot say what is going on because I do not know."