William Eric Gallas is a French retired footballer who played as a defender. He played most of his footballing career in France and England before finishing his career in Australia with A-League club Perth Glory. Gallas began his career in France, before being signed by English club Chelsea in 2001. He transferred to Arsenal as part of an exchange deal in 2006. He then signed for rivals Tottenham Hotspur in 2010.
While his career has been successful, including Premier League titles in 2005 and 2006, Gallas has also had controversy due to on-field behaviour and friction with other personnel. In 2007, he was named Arsenal's captain, but was removed from the role during the 2008–09 season after criticising teammates in a media interview. He left Arsenal at the end of the 2009–10 season, when his contract expired, later signing for rivals Tottenham. He was released at the end of the 2012–13 season when his contract expired. He retired from professional football on 16 October 2014.
In October 2002, Gallas debuted for the France senior team in a UEFA Euro 2004 qualifier against Slovenia. He was included in France's squad for the 2003 FIFA Confederations Cup and played the full 90 minutes as Les Bleus defeated Cameroon 1–0 in the final. He went on to represent France at UEFA Euro 2004, starting in three of France's four matches, as they were knocked out by eventual champions Greece. In August 2005, Gallas scored his first goal for the national team in a friendly match against the Ivory Coast.
Gallas was ever present as France finished runner-up in the 2006 FIFA World Cup, losing on penalties to Italy at the Berlin Olympiastadion. In September 2006, he won his 50th cap for France in a 3–1 win against Italy at the Stade de France in a UEFA Euro 2008 qualifier. At UEFA Euro 2008, Gallas was a regular starter as France were knocked out at the group stage.