Connact are in PRO 14 action today away to the Scarlets at 5.15pm and Leinster face Benetton in Italy at the same time.
Before that at 3pm Munster host the Dragons.
Ireland have slumped to a 19-12 defeat against Japan at the Rugby World Cup.
A try from Kenki Fukuoka in the 59th minute turned the game in favour of the hosts.
Ireland had led up to that point after first half tries from Garry Ringrose and Rob Kearney.
Joe Schmidt's side failed to score in the second half and had to settle for a losing bonus point.