Swansea City secured the services of England international Jonjo Shelvey from Liverpool following a £5million deal in July 2013.
The fee for Shelvey, who penned a four-year deal, also includes potential add-ons on top of the transfer fee.
Shelvey spent part of his youth career at Arsenal and West Ham before his move to Charlton.
He spent three seasons at The Valley, making his debut as a 16-year-old, which saw him become the Addicks’ youngest player.
In just his third appearance for the club, he started the opening 2-0 win over the Swans in the Championship.
Shelvey’s performances with Charlton saw him attract the eye of Liverpool, who took him to Anfield for £1.7million.
He made 21 appearances in all competitions during his first season with the Reds, and then spent time on loan with Blackpool – scoring six goals in ten games – during the 2011-12 campaign before ending the season back at Liverpool by starting in the 1-0 at the Liberty on the final day. In 2012-13, he made 32 appearances under Brendan Rodgers which included scoring four goals in ten Europa League appearances.
His form on the domestic and European scene earned him international recognition – winning his first England cap in a World Cup qualifier against San Marino at Wembley in October 2012 before featuring for the Under-21s in the European Championships last summer.
Shelvey scored his first Swansea goal in the 2-2 draw with former club Liverpool in September 2013, while his stunning 47-yard strike against Aston Villa was named goal of the season at the club's end-of-season awards night.