Tottenham Hotspur had been hoping to sign Sissoko on deadline day, but were put off by Newcastle's £30 million valuation.
Blackburn Rovers have signed Scotland international defender Charlie Mulgrew on a three-year deal.
Middlesbrough have signed Adama Traore from Aston Villa, with Albert Adomah moving in the opposite direction.
Ipswich Town have confirmed the signing of Jonny Williams from Crystal Palace on a season-long loan.
Burnley have completed the signing of Derby County midfielder Jeff Hendrick for a club-record undisclosed fee.
Newcastle United striker Emmanuel Riviere has joined Spanish La Liga side Osasuna on loan for the remainder of the 2016-17 season.