Complex sentence: On 1 September 2013 Atsu agreed to join Chelsea on a five-year contract, for a reported £3.5 million, being immediately loaned to Dutch club Vitesse, for the rest of the 2013--14 season.
Split into simpler sentences: On 1 September 2013 Atsu agreed to join Chelsea on a five-year contract, for a reported £3.5 million. He was imminently loaned to Dutch club Vitesse, for the rest of the 2013-14 season.