#1 Fernando Torres (Liverpool to Chelsea, £50m)
Chelsea signed Fernando Torres from Liverpool in January 2011 for a British record fee. The transfer was a surprise to the football world given that the two clubs are fierce rivals. Liverpool fans were shocked while Chelsea fans were excited by the deal.
The Spanish striker had enjoyed an incredible career at Liverpool and was one of the most feared forwards in the league at the time. Torres had scored 65 goals in 102 Premier League appearances for the Reds.
Chelsea expected Torres to continue with the same form he had shown at Liverpool. They hoped that his contribution would turn the London-based club into a dominant force in England and Europe. However, the Spanish striker would fail to live up to the expectations.
Torres struggled for form during his time at Chelsea, and only managed to score 20 goals in 110 Premier League appearances. The poor performance meant that the Spanish striker had failed to justify the £50m paid for his services.
Torres was later loaned to Milan and Atletico Madrid, before the latter signed him on a permanent basis.