Sunderland have been encouraged to offer one out-of-contract star a new deal this summer. Sunderland only have a few players whose contracts are set to expire at the end of the season, though they certainly won’t be the only players leaving the club. A disastrous season ending in a bottom-half finish is likely to bring on a complete overhaul of the squad, with the likes of Luis Hemir and Jewison Bennette likely to be loaned out. The Black Cats will also see Callum Styles and Mason Burstow’s loan spells come to an end, with neither of them particularly impressing during their time at the Stadiu…