Andre Schurrle has completed a £22m move from Chelsea to Bundesliga side Wolfsburg.
He joined Chelsea for £18m from Bayer Leverkusen in June 2013 and scored 14 goals for the club.
Schurrle's transfer allowed Colombian winger Juan Cuadrado to move to Chelsea from Fiorentina in a £23.3m deal.
The 26-year-old signed a four-and-a-half-year contract at Stamford Bridge.
Schurrle was mostly used as a substitute by manager Jose Mourinho and came off the bench to score in the 1-1 draw with title rivals Manchester City in September.
Last month, Mourinho said it would take a "phenomenal" offer to sell him in the current transfer window.