West Brom have sacked Nicolas Anelka citing "gross misconduct" after the striker claimed on Twitter he had quit the club.
Mauricio Pochettino expects to be at Southampton next season and is looking forward to working with chairman Ralph Krueger.
Former Sunderland chairman Niall Quinn has urged owner Ellis Short not to appoint a journeyman manager as Paolo Di Canio's replacement.
The Texan is currently assessing his options - former Brighton boss Gus Poyet has emerged as the favourite with Sky Bet - after showing the 45-year-old Italian the door on Sunday evening with the dressing room in disarray.
However, while the club has been approached by a series of agents offering up candidates, Quinn is adamant the Black Cats need a man to establish a united front once again.
Quinn, who handed Roy Keane the chance to launch his managerial career at the Stadium of Light, told talkSPORT: "Sunderland need someone to galvanise the dressing room.
"They need someone for the senior players to really buy into and show the younger players how it's done. They need someone charismatic to do that, someone who gives them a lift.
"They don't need someone who is going to go out and say, 'I'm in a hopeless situation here, these players are no good'. Sometimes managers try and buy themselves a bit of time by saying they have got a really tough job.
"They need a manager who believes in them, not someone who's going to do this because it's a journeyman type job, but someone who's going to roll their sleeves up, be charismatic and say, 'We're still fighting'."
Sunderland will take their time as they attempt to get the right man, although the jostling for position is already under way.
Press Association Sport understands former England boss Steve McClaren is among those who would be open to an approach.
However, sources close to Roberto Di Matteo have indicated the Italian has some misgivings over the post, while Celtic's Neil Lennon has already distanced himself from the speculation, as has current Watford manager Gianfranco Zola.
But Quinn has called for development coach Kevin Ball, who has been placed in temporary charge, to be considered.
He said: "I'd give Kevin Ball a look at it. Nobody can expect Sunderland to win their next two Premier League matches against Liverpool and Man United because they're two of the best teams in the country.
"It would be wrong for people to turn around and say, 'You're on trial for the next two games'. The important things are the performance levels, the application and the dedication."
Sunderland moved swiftly on Sunday to resolve the situation when it became apparent that the breakdown in the relationship between Di Canio and his players was irreparable.
The Italian had already been lined up when they decided to part company with predecessor Martin O'Neill in March, and they were able to make a swift appointment.
However, while it was clear that all was far from well within the camp, there were no imminent plans to unseat Di Canio until things came to a head in the aftermath of Saturday's 3-0 Barclays Premier League defeat at West Brom.
That said, Short, a man who has made his millions by turning around failing companies, has never been one to dwell too long when there has been a big decision to be made during his time at the Stadium of Light.
Martyn McFadden, editor of Sunderland fanzine A Love Supreme, said: "If you look at some of the managers who have left under Short, he doesn't let the grass grow under his feet. When he decides he is going to sack someone, he just does it.
"After the first meeting he had with Roy Keane, Keane resigned; the first time the fans turned against Bruce after we lost against Wigan, he was sacked the next day; Martin O'Neill was not given a full season in charge of the club despite having an excellent CV, and we were never in a relegation place under him.
"We may have gone down [under] O'Neill, we will never know the answer to that, and it's the same thing with Di Canio. He may have turned out to be a good manager, but we will never know.
"Maybe that's just modern football. Maybe in 10 years' time, a manager will be sacked for losing the first game of the season 4-0."