 In his first season, Tiendalli was sidelined by a groin injury and missed the entire season.After recovering from the injury, Feyenoord loaned Tiendalli to city rivals Sparta Rotterdam on 25 January 2008, where he was re-united with his former Utrecht coach Foeke Booy.Tiendalli was inserted straight into the starting line-up, putting in a fine display on his debut.