Keane told the Sunderland Echo: "Yes, there has been interest in Greg and it's something that we are looking at.
"There hasn't been any firm bid yet as things stand but it is a situation that is on-going."
Tribal Football Staff are dedicated to the football tribes from all over the world. Our team is passionate about delivering football news to our hundreds of thousands of followers in all the corners of the globe. Football is life, It never stops, Neither do we.