England hooker Jamie George goes off injured as three-time winners Saracens fall to a shock 32-24 home defeat by Castres in the Investec Champions Cup.
Great Britain's women suffer a heavy defeat against Australia after earlier fighting back to beat Ireland 21-12 in their opening Pool B match of the rugby sevens competition at Stade de France.
Matt Richards and Tom Dean win 200m freestyle gold and silver to secure Great Britain's first swimming medals of the World Aquatics Championships in Japan.