12 Dec, 14:42
Prop Cian Healy is expected to miss the start of the 2014 RBS 6 Nations after undergoing surgery on his injured ankle on Wednesday.
The Australian-born openside flanker, who is Irish-qualified, was making his debut for Dungannon in Saturday's Ulster Bank League clash with Dublin University when he damaged his fibula.
Meanwhile, Doyle's back row colleague Nick Williams continues to be assessed for the rib injury he suffered in last Friday's derby victory over Connacht at Ravenhill.
The New Zealander, one of the try scorers on the night, was forced off with five minutes remaining in the 25-0 win.