Jack Conan was the only Ireland player not to train with the squad on Tuesday morning ahead of Saturday's Rugby World Cup clash against Tonga.
The Leinster back-row trained on his own in the gym as he continues his recovery from a foot injury sustained in the warm-up match against Italy on 5 August.
Centre Robbie Henshaw (hamstring), prop Dave Kilcoyne (hamstring) and hooker Dan Sheehan (foot) all took part in training.
The team to face Tonga in the Pool B clash in Nantes (8pm) will be named on Thursday.
Andy Farrell’s side began their campaign with a record 82-8 victory over Romania on Saturday.
Meanwhile, Craig Casey and the majority of his team-mates gathered to see the Springboks defeat the Scots 18-3 on Sunday afternoon.
He is braced for a physical encounter against the reigning world champions on 23 September at Stade de France, while also expecting similar this coming weekend.
"There was a good 25 of us in the team room watching it, so there was a good buzz around that, a very physical game," he said.
"Scotland played very well first half, as well as South Africa, definitely physical.
"(They) just outmuscled them in the end, that's what we’re expecting in a few weeks, that physical encounter."
Speaking about Tonga, Casey added: "We know how tough the Pacific island teams are and we’re going to have to be at our best.
"We’ve got to go up another level (from Romania)."
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Additional reporting: PA
