Complex sentence: After the World Cup in Germany, Navidkia signed a contract with Sepahan again.Where he had difficulties with the injuries during his career in Sepahan and finally in 2009-10 season he had his most stable season after a few years.
Split into simpler sentences: After the World Cup in Germany, Navidkia signed a contract with Sepahan again. He had difficulties with the injuries during his career in Sepahan and finally in the 2009-10 season he had his most stable season after a few years.