Chelsea complete the signing of Christian Atsu from Porto

Christian Atsu is off to Holland. Photo: PA

Chelsea have signed winger Christian Atsu from Porto, immediately loaning the Ghanaian straight to Vitesse Arnhem.

The 21-year-old has joined for an undisclosed fee, and will spend the season strutting his stuff in the Eredivise.

He has agreed a five-year deal with the club, and is expected to return to Stamford Bridge for the start of the 2014/15 campaign.