Ryan Dominic Bertrand (born 5 August 1989) is an English footballer who plays for Chelsea as a left back. Bertrand began his career at Gillingham, before being signed by Chelsea in July 2005. After graduating from the Chelsea youth system, Bertrand was sent on to loan to various club between 2006 and 2010. He made his debut for Chelsea six years after joining them, coming on as a substitute against Birmingham City on 20 April 2011. At the start of the 2011–12 season, Bertrand signed a new four-year contract with Chelsea, and was made understudy to Ashley Cole. On 19 May 2012, Bertrand made his European debut in the 2012 UEFA Champions League Final, starting in an unfamiliar left wing role in front of Cole. He became the first player to make his Champions League debut in the final.