Sunderland’s 10 most expensive signings of all time
9. Jeremain Lens
Dick Advocaat splashed out £9.7million on Jeremain Lens during his only summer transfer window in charge of the Black Cats, having previously worked with the Dutch winger at AZ and PSV. But Advocaat lasted just a handful more games before handing the reigns to Sam Allardyce, whilst Lens soon disappeared from the starting XI and was loaned out to Fenerbahce last summer.