Exeter relinquish 14-point lead in defeat to Castres

Top 14 champions Castres hit back from 14-0 down inside the opening 15 minutes to edge past Exeter 29-25 in the Heineken Champions Cup, despite playing with 14 men for 44 minutes.

Back-rower Ma'ama Vaipulu was dismissed for a high tackle on hooker Luke Cowan-Dickie.