Both Wasps and Leinster must plan without their international flankers for the all important Round 5 Heineken Cup Pool 2 clash at Twickenham on Saturday, 17 January.
On Tuesday evening Leinster back row Shane Jennings has handed a three week suspension from an IRFU Disciplinary Committee for a punching offence in last weekend's Magners League victory over neighbour's Connacht. The Ireland international will not be allowed to return to action until Tuesday, 27 January and now misses both of Leinster's final two Pool matches away to Wasps in Twickenham and visit of Edinburgh's in Round 6.
Wasps and England international Tom Rees will be unavailable to the two-time Heineken Cup winners for both the must win Round 5 clash with Leinster and their Round 6 trip to Castres after tearing a medial knee ligament during last weekend's Guinness Premiership game against Harlequins.
The 2007 Heineken Cup winner is not expected to return to the field for at least two months and looks set to miss all of England's Six Nations campaign.