Celtic midfielder Scott Brown has been urged to reject any offer from Portsmouth.
Hoops teammate Gary Caldwell said: "Scott would be a natural in the Premiership but I don't think there is much chance of him going to Portsmouth.
"He is also a natural for Celtic and I am sure he'll be here for a long time.
"The Premiership is great and there are some big clubs although people make it out to be better than it is.
"The top four or five are streets ahead but there are some bad games and poor teams."