Button completed a move to local rivals Fulham on Tuesday.
The Dutch playmaker spent two successful years at Spurs.
The Magpies have already signed eight new players this summer.
Mark Warburton has signed nine players for Ibrox side Glasgow Rangers this summer.
One of West Ham United's most important players has heaped praise on Sunderland boss Sam Allardyce and backed him for the England job.
Tottenham Hotspur signed Vincent Janssen from AZ Alkmaar this summer.
The Frenchman is looking forward to the new campaign after an injury-plagued debut season in English football
Sunderland could be looking for a new manager if Sam Allardyce takes the England job.
The former Leeds United midfielder wants to see the Whites back in the Premier League.
Celtic are reportedly keen on Heerenveen defender Jeremiah St. Juste.
Tottenham Hotspur need pacy wingers and the Manchester United player could be set for a frustrating season at Old Trafford.
Sainsbury’s has warned that up to 600 head office jobs are at risk in its £1.4bn takeover of Argos owner Home Retail Group, but promised the deal would ultimately create several hundred new roles.
The wife of retail tycoon Sir Philip Green has defended their use of companies based in tax havens, praising their “strong regulatory regimes”.