Born in Guadalajara on 13 April 1991, the Mexican Under-20 international was signed from Chivas in his home country in August 2011.
He was almost immediately loaned out to Vitesse Arnhem in Holland for a season to be spent acclimatising to European football. He made three appearances for the Dutch side, while catching the eye with a string of impressive displays for the reserves. He will play the 2012/13 season on loan to Spanish second division team Sabadell.
Davila, who signed a five-year contract with Chelsea, can play either as an attacking midfielder or a forward.
Standing 5ft 7in, he is accomplished with the ball at his feet and a fine finisher with a strong team ethic.
He represented his country at the 2011 Under-20 World Cup in Colombia, helping them to a bronze medal with a goal in their 3-1 third-place play-off win over Gael Kakuta's France, and appearing in all seven of their competitive matches.
He received his first call up to the national senior side for the 2011 Copa America but didn't feature in any matches.