Mark McCall will not name his Ulster side to meet Munster at Musgrave Park until closer to kick-off to review the condition of his players after the November internationals.
The likes of Andrew Trimble, Tommy Bowe and Simon Best returned to their province for the first time in four weeks and McCall has named a 22-man squad.
ULSTER (v Munster).
Forwards:
Simon Best, Bryan Young, Rod Moore, Rory Best, Nigel Brady, Justin Harrison, Matt McCullough, Ryan Caldwell, Neil Best, Neil McMillan, Roger Wilson, Stephen Ferris.
Backs:
Isaac Boss, Kieran Campbell, David Humphreys, Adam Larkin, Paul Steinmetz, Kevin Maggs, Andrew Trimble, James Topping, Tommy Bowe, Bryn Cunningham.