After the Olympics, Pottharst retired, and Cook found a new partner in Nicole Sanderson. They won a bronze medal at the 2003 Beach Volleyball World Championships in Rio de Janeiro, and by the end of the 2003 world tour, were ranked fourth in the world. They were subsequently selected to represent Australia at the 2004 Athens Olympics. After a promising start, they finished out of medal contention, losing to teams from Brazil and the United States. For the 2008 Summer Olympics, Cook partnered with Tamsin Barnett, finishing fifth overall.