Brian O'Driscoll's unlikely to play in Leinster’s Heineken Cup clash with Opreys in Swansea on Saturday. Forwards coach Jono Gibbs told a press conference that the former Ireland skipper hasn't fully recovered from the calf injury that kept him out of last weekend's defeat to Munster. O’Driscoll's outside centre berth is likely to be filled by Brendan Macken. Matt O'Connor will name his team at midday on Friday.