4) Ivan Rakitic (Barcelona)
After becoming one of the best midfielders in La Liga last season with his old club Sevilla, £16.1m is certainly not a lot for Barcelona to pay as they found their Cesc Fabregas replacement for nearly half the price they sold the Chelsea star for. The Croatian international is a supremely talented and intelligent playmaker from a deep-lying role, and should fit in well with the style of play at the Nou Camp as he is given the difficult task of replacing club legend Xavi as he nears the end of his glorious career.