But who could the Sunderland owner now turn to? With a number of managers - both experienced and fairly youthful - available for hire, Donald will likely have no shortage of suitors for the vacant role – which is still an appealing one. Here’s 13 managers that Sunderland could line-up to fill the void at the Stadium of Light, with some familiar faces potentially in the frame:
5. SOL CAMPBELL
A more left-field appointment could be that of Campbell who, while their league finish wasn’t too impressive, made a big impact at Macclesfield Town. Expect him to be linked with the job in the coming weeks. Photo: Pete Norton
6. GARY ROWETT
While his record in recent years is far from the best, Rowett has demonstrated his ability as a manger in the Championship and could be an attractive proposition for Sunderland. He’s currently looking for a new job after leaving Stoke earlier this year. Photo: Catherine Ivill
7. GARETH AINSWORTH
It’s hard not to admire the job Ainsworth has done with Wycombe, taking them from fourth tier strugglers to League One promotion contenders in a matter of years. He’d be a fine appointment, but some hefty compensation may be required. Photo: Pete Norton
8. NEIL HARRIS
Having left Millwall earlier this season, Harris is on the look out for a new role. Could Sunderland appeal? Photo: Naomi Baker