The Black Cats are short in the attacking department and they might lose Stewart in the ongoing window.
Southampton are keen on signing the 27-year-old Sunderland forward this summer and have gone in with a fresh offer.
Sunderland rejected Southampton’s initial bid, but Saints will be hoping the new proposal does the trick.
Stewart’s departure in the ongoing window would leave Tony Mowbray with only two options in the forward line in the form of youngsters Luis Semedo and Eliezer Mayenda.
However, now it has been claimed that Sunderland are close to landing another striker soon.
It is unclear who the player that the Black Cats might be close to bringing through the door is, with a number of strikers having been linked.
Losing Stewart however could cause Sunderland boss Tony Mowbray to feel he needs to add more than just one new striker.
