Sean O'Brien suffered another injury blow on Saturday, but Ireland coach Joe Schmidt says he has the resilience to make a quick return.
Gethin Jenkins dragged a shot at goal wide after requiring assistance to keep the ball on the tee in a victorious final match.
Fergus McFadden faces a lengthy spell on the sidelines after suffering a high-grade tear of his hamstring in training.
Munster overturned a 14-point deficit to beat Glasgow Warriors thanks to Rory Scannell's monster penalty with the final play.
Maxime Medard's late try proved crucial as Toulouse beat European Champions Cup holders Leinster on Sunday.
Leinster accelerated out of sight in the second half of their European Champions Cup opener as Wasps were completely outclassed.
Leinster are five points clear at the top of Conference B after the defending champions beat Munster at the Aviva Stadium.
Leinster's Pro14 title defence continued with a fourth win in five, with Glasgow Warriors and the Ospreys matching that return on Saturday.
The Southern Kings claimed a first Pro14 win of the season and consigned Glasgow Warriors to a first loss in Port Elizabeth.
Glasgow Warriors are the only club to have won each of their opening three fixtures after overcoming the Cheetahs.
Pro14 champions Leinster were defeated by last season's runners-up Scarlets in a tense clash on Saturday.
Bryan Byrne's late try and Ross Byrne's subsequent conversion saw champions Leinster snatch victory over Cardiff Blues in the Pro14.
Leinster will have to see off three former champions if they are to retain their European Champions Cup title in 2018-19.
Joe Tomane has joined Leinster from Montpellier ahead of the 2018-19 season.
Brian O'Driscoll sees no reason why Leo Cullen or Stuart Lancaster should depart Leinster even if their services are sought elsewhere.
Rory Best's hamstring injury means he will miss Ireland's three-match series in Australia next month.