Summary:
Southampton, Sunderland and Newcastle are all in the hunt for new defenders.

Full article:
By . Simon Jones . Southampton have failed with a new £9.5million offer for Sporting Lisbon defender Marcos Rojo. Meanwhile, Newcastle are ready to revive interest in Celtic defender Virgil van Dijk who has also been watched by the Saints and Sunderland. Seemingly on the lookout for defenders, Sunderland have confirmed the signing of right-back Santiago Vergini on loan. Bid rejected: Southampton have failed with a new £9.5million bid for Sporting Lisbon defender Marcos Rojo . Wanted man: Southampton target Virgil van Dijk of Celtic is also wanted by Premier League rivals Newcastle .