Henderson set for home debut

Back row Iain Henderson will make his home debut for Ulster in place of the injured Nick Williams for Friday's Heineken Cup Pool 4 opener against Castres Olympique (8.00pm).

Williams has failed to recover from a rib injury picked up in the 25-0 win over Connacht on Friday night so Henderson will make his fourth appearance for the Province, his first in the Heineken Cup.