Four days for Moyes to use PVA Palace cash to lift Cats

But a loan deal is most attractive to the cash-strapped Black Cats as it would free up funds for other areas, with 26-year-old Contento available as a short-term option.

German-born Contento, who won the Bundesliga three times during his time at Bayern Munich, has made 14 appearances for Bordeaux this season.

Victor Anichebe’s injury means Moyes also desperately needs to add firepower given Anichebe and van Aanholt are joint-second top scorers with three goals each.

Napoli frontman Manolo Gabbiadini won’t be arriving on Wearside, though, despite reports in Italy linking Sunderland with a move. Southampton are favourites to secure his signature.

The van Aanholt deal represents a sizeable profit for Sunderland, who rejected a £7million offer from the Eagles earlier this week.

Sunderland held out for their valuation for a man who joined them from Chelsea for just £1.5million in July 2014.

Sunderland chief executive Martin Bain said: “If a player openly states he does not want to play for our club, then it is clear that we have a decision to make.

“In this instance and in regard to this particular player, we have done what we feel is right for Sunderland, which will always be our priority.”

The move will see the 26-year-old – who signed a bumper new contract at Sunderland in the summer – team up again with former boss Sam Allardyce.

Van Aanholt was arguably Sunderland’s most improved player last season under Allardyce, but his defending has again come under scrutiny this season.

“His contribution, in terms of assists and goals, was massive,” said Allardyce. “When it came to defending, he got better with me and listened to what we told him about where the weaker side of his game was and he made it stronger.

“If everything goes well, I look forward to him joining me again.”

Sunderland Under-23s entertain Liverpool at Eppleton CW in Premier League 2 tomorrow (noon kick-off ).

Sunderland are sixth, three points behind their third-top visitors.