Ahead of Leinster's crucial Champions Cup clash with Toulouse this weekend, the Irish province are as yet uncertain whether captain Johnny Sexton will be involved.
Conducting this afternoon's pre-match discussion, Stuart Lancaster informed reporters that a recent injury may rule the World Player of the Year out of contention.
"Johnny has had the problem for a few days now and he hasn't trained since picking it up in the Munster game," Lancaster stated.
Seemingly confident that Ross Byrne can fill any vacancy left by Sexton, Lancaster declared: "Ross has showed himself capable in Europe last season and is probably the most improved player in our squad in the past 12 months."
Currently sitting second in their Champions Cup Pool, Leinster suffered a surprising defeat to the French side in the reverse fixture October.
After easily overcoming a weakened Ulster side in their Pro 14 clash this weekend, Leo Cullen called on the province's fans to cultivate an atmosphere at the RDS that will be conducive to a desired home win.