Sunderland have signed the former Tottenham man, and now have their sights set on a midfielder.
With three defenders purchased - Kaboul, Sebastian Coates and Adam Matthews - the Wearside club are now looking to strengthen the attacking side of their team, with a creative midfielder lined up.
Jeremain Lens has also been brought to the club from Dynamo Kyiv, but as a winger, he is much more direct than the game-controlling player Dick Advocaat wants to sign.
The Dutch boss is looking for a player to sit in the central midfield zone, and be the main source of chance creation of his team, whilst Lens plays in a more advanced role in the final third.
There are no targets named in the report, but it is likely that the Black Cats have already been working through potential signings whilst sorting out their defensive reinforcements.
The likes of Jordi Gomez, Seb Larsson, Jack Rodwell and Lee Cattermole are the current selections in the midfield positions, but none are creative enough to warrant a role as the main playmaking outlet in the side.
Advocaat has prioritised a creative midfielder as Sunderland’s next signing, and it is expected that a player will be brought to the Stadium of Light in the coming weeks.