Put pen to paper on professional contract in 2011 after impressing in the youth ranks.
The Neath-born left-back is an FAW Welsh Youth Cup winner, scoring in the final against West End at Stebonheath Park.
He signed a new two-year pro contract in June 2012, and impressed during the club's pre-season tour of America.
Made his senior debut after coming off the bench in the Premier League win over West Ham before earning his first start in the Capital One Cup victory over Barnsley.
His impressive displays at club level also earned him a Wales debut against Scotland in a World Cup qualifier.
Davies was rewarded with a new three-and-a-half year deal in November 2012. Overall, he made 44 appearances for the Swans in 2012/13 and was named Young Player of the Year.
He retained that accolade the following season as he scored twice in 34 top-flight appearances as the Swans finished 12th in the Premier League during the 2013-14 campaign.