Ireland will return to their training camp today in west Dublin, as preparations begin for a clash against France in Paris on 14 March.
It comes amid reports that this year's competition could be wrecked, with Italy's visit to Dublin this weekend already postponed.
Andy Farrell has called together 35 players to Abbotstown, with Dave Heffernan and Ultan Dillane set to join the group later on after playing in Connacht's victory against Southern Kings yesterday at Port Elizabeth.
Meanwhile Leinster's Ryan Baird will also train with the group, having previously been part of a preparatory camp in Portugal earlier this year. He scored a hat-trick of tries for his province as they beat Glasgow on Friday night.
Prop Cian Healy is a notable absentee after he was ruled out of the remainder of the tournament due to a hip injury suffered in the loss to England.
Ireland training squad
Backs: Bundee Aki, Billy Burns, Ross Byrne, Andrew Conway, John Cooney, Keith Earls, Chris Farrell, Robbie Henshaw, Dave Kearney, Jordan Larmour, Stuart McCloskey, Luke McGrath, Conor Murray, Jonathan Sexton, Jacob Stockdale
Forwards: Ryan Baird, Will Connors, Max Deegan, Ultan Dillane, Caelan Doris, Tadhg Furlong, Dave Heffernan, Iain Henderson, Rob Herring, Ronan Kelleher, Dave Kilcoyne, Jack McGrath, Jack O’Donoghue, Peter O’Mahony, Tom O’Toole, Andrew Porter, James Ryan, CJ Stander, Devin Toner, Josh van der Flier