The 23-year old Dutch defender has penned a four-year deal for an undisclosed fee after spending the past two-and-a-half seasons with Vitesse Arnhem.
Sunderland AFC (@SunderlandAFC) July 25, 2014
Left-back van Aanholt first joined Chelsea's youth academy as a 17-year old back in 2007 but manage djust eight first team appearances for the Blues.
During his time at Stamford Bridge, the two-time Dutch international had loan spells with Coventry City, Newcastle United, Leicester City, Wigan Athletic and finally Vitesse where he made 84 appearances.
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