Complex sentence: Therefore, they decided to sign for Manchester United over Arsenal, and the two clubs agreed a deal in February 2007; the twins moved to Manchester in January 2008 without ever having played for the Fluminense first team.
Split into simpler sentences: Therefore, they decided to sign for Manchester United over Arsenal, and the two clubs agreed a deal in February 2007. The twins moved to Manchester in January 2008 without ever having played for the Fluminense first team.