It's hard to imagine Andy Farrell enjoyed a peaceful night's sleep last night.
The Ireland head coach was in an upbeat mood following the 17-13 win against Samoa in Bayonne, doing his best to take the positives from a laboured Irish performance.
Farrell has often welcomed the challenges that 80 minutes of rugby can throw a coach's way, and genuinely seemed to relish every last-minute injury and inconvenience that his team faced during their Six Nations campaign.
Even if he was pleased to come through a difficult night in Bayonne, his final few selections for his 33-man Rugby World Cup squad will no doubt have caused him a few twists and turns through the night.
He will announce his squad at 4.30pm this afternoon at the Shelbourne Hotel in Dublin, but first he will need to assess the damage from Stade Jean Dauger.
Cian Healy's lower leg injury will give cause for the greatest concern. The 35-year-old's prospects of a fourth trip to the World Cup hang in the balance after he had to be helped from the pitch following a collapsed scrum midway through the opening half of the game.
Farrell had no clear prognosis of the injury in the immediate aftermath, with a scan to be taken first thing this morning, but the initial viewing did not look good for the veteran prop.
During these warm-up games, we've become experts at reading body language having watched Dan Sheehan and first Jack Conan limp out of games with similar foot injuries.
On both occasions the players walked freely to the touchline, and Sheehan even attempted a grimaced jog. The pained and anxious look on Healy's face as he struggled to put any weight on his right leg did little to ease the worries.
If he is to miss the World Cup, it's undeniably a blow for Ireland. While Andrew Porter has been the starting loosehead for two years now, Healy has remained integral to the matchday 23, with his ability to play right across the front row a valuable asset to the team.
For a thread of optimism, however, we're reminded of last summer's tour of New Zealand when Healy was carted off with what looked like being a tour-ending ankle injury, only to return within a few days.
Dave Kilcoyne sat out these last two games with his own injury issues, although Farrell declared him fit and ready when speaking to RTÉ Sport last night. Were Healy to miss out, Jeremy Loughman would be the man to step in as third-choice loosehead.
The injuries will have given Farrell a disrupted sleep, while some of his players will be nervously awaiting their squad fate this morning.
The fitness of Sheehan and Rónan Kelleher will have a larger say in whether or not Tom Stewart will be included, but the Ulster hooker failed to grasp the nettle on his first Test start, playing his part in a struggling first half lineout while conceding a pair of penalties.
Stuart McCloskey (above) will also be feeling anxious over the squad news. The centre was his usual physical self with 12 carries in midfield, but a careless intercept pass for Samoa's first try was the last thing he needed on a night where he could have rubberstamped his selection.
Staying on the Ulster theme, few players have come through this warm-up schedule with a better stock price than Rob Herring.
The experienced hooker has long been a reliable option for Farrell in a position where he has seen regular injuries, and the way in which he came off the bench to settle Ireland's lineout problems was arguably the turning of the game. Given the injury issues surrounding Sheehan and Kelleher, the 33-year-old could prove to be a key player at the World Cup.
The introduction of James Ryan and Peter O'Mahony also aided the lineout after the break, but having seen the setpiece stutter in previous games, it was troubling to see how it deteriorated in the first half against Samoa.
Some allowances can be made for the dreadful weather conditions, but a litany of errors saw Ireland lose five of their 12 throws in the first 40 minutes.
The positives were fleeting; Conor Murray (below) performed well in difficult circumstances for a scrum-half, while Ross Byrne was clever in how he kicked for territory in the final quarter of the game.
As usual, Tadhg Beirne came up with some valuable steals at the breakdown, while Ryan Baird impressed on defensive lineouts during the first half.
As sloppy as the performance was, it's unlikely that Farrell will dwell too much on it. Two weeks out from the World Cup, and 24 hours away from the squad being named there was always likely to be some tension in the performance. South Africa's hammering of New Zealand on Friday, England's defeat to Fiji, and Scotland's scoreless first half against Georgia show that these warm-up games can throw up some strange games.
At the very least, the performance has given Ireland a wake-up call ahead of their biggest World Cup challenge yet.
