Taulupe Faletau's injury worries deepened as it was revealed he requires a second operation on his broken right arm.
The Wales No 8 fractured his forearm on his Bath comeback from a similar injury the weekend before Warren Gatland announced his Six Nations
squad back in January.
At first it was thought he would miss the entire Championship, then that was revised to a four-to-six week layoff.
But on Tuesday Bath revealed the 28-year-old needs to go under the knife again, setting his return back once more.
Director of Rugby, Todd Blackadder, said: 'We're gutted for Taulupe, but this is the best course of action for him moving forwards as a player.
'We will know more in terms of timeframes following the surgery, but we're looking forward to welcoming him back into the squad.'
Back in October Faletau broke his arm which saw him miss Wales' autumn Tests.
The two-time Lion then returned in a stellar display against Wasps in the Champions Cup last month, but re-broke his forearm in a cruel twist of fate.
And now he needs 'further expert opinion' and more surgery.
Luckily for Wales they have incredible back-row stocks. In Faletua's absence Ross Moriarty and Josh Navidi have both performed well at No 8, with Justin Tipuric, Thomas Young and Aaron Wainwright playing either side.
And with Ellis Jenkins, James Davies, Aaron Shingler and Dan Lydiate all injured there is an incredible amount of back-rowers for Gatland to pick from come the World Cup - he will be hoping they are all fit to give him a selection headache.