Wales full-back Leigh Halfpenny kicked a 79th-minute penalty to break Irish hearts and steal a 23-21 Six Nations win in Dublin on Sunday.
Revenge was on the menu for Ireland following their World Cup exit against the Welsh, but defeat is what they were served at the Aviva Stadium where they have now lost three games on the trot.
At 21-15, it looked like Ireland's game for the taking with five minutes left on the clock and Wales lock Bradley Davies in the bin. However, the visitors had other ideas and cut the deficit to a one-point ball game through a George North try.
Halfpenny missed the conversion to take the lead, but held his nerve to slot over a last-gasp penalty four minutes later — after Stephen Ferris was sin-binned for a tip tackle on Ian Evans — to deny the Irish and help open his team's Six Nations account with an upset win.
Wales played with an energy that Ireland failed to match for the majority of the first half, and were desperately unlucky not to have a try awarded early on by the TMO who — after several replays — decided it was "inconclusive" after a sea of red jerseys barged over the line.
But the Welsh weren't to be denied again by the TMO following centre Jonathan Davies's well-worked try in the corner that was set up by Rhys Priestland, but which the pivot failed to convert.
Priestland, in doubt for this match before he was declared fit to play on Friday, showed no signs of discomfort from the knee injury that kept him out of action for two weeks with ball in hand.
However, he was off-target with the boot after missing his second shot at goal with a penalty attempt from bang in front that would have extended his team's lead to five points.
Instead, it was Ireland who managed to find some spark produced from a rare attack inside Wales' 22 that started with Tommy Bowe breaking the line and ended with hooker Rory Best crossing the whitewash for a crucial score before half-time.
Sexton added the extras from far out and Ireland went into the half-time sheds 10-5 in front.
Ireland opened up the second half in the same fashion as they did the first courtesy of another three points from Sexton.
Halfpenny, who had taken on the kicking duties, landed a long-range attempt in reply and centre Davies capitalised on North's bulldozing run for a superb second try.
Halfpenny converted but Wales' lead was only brief as Sexton booted a tricky penalty and, when Bradley Davies was sin-binned for tipping Donnacha Ryan on his head, Bowe soon scored in the corner after taking a magnificent pass from his pivot.
Sexton missed the conversion and a penalty — both difficult kicks — and the irrepressible North crashed over only for Halfpenny to miss the conversion before accepting the second invite after Ferris's indiscretion.
Man of the match: For Ireland, Tommy Bowe created one and scored one, while Jamie Heaslip was the pick of the Irish forwards. For Wales, Ryan Jones ran hard and offered Wales leadership when Sam Warburton had left the pitch through injury and Jonathan Davies richly deserved his two-try haul. However, wing George North was undoubtedly Wales' star man. He bullied Ireland's backline at will, showing superb skill setting up Davies's second try and tremendous strength for his own five-pointer. Who needs Shane Williams when you got this guy out wide?
Moment of the match: Take your pick … Davies' second try … Bowe's five-pointer … North's score … Halfpenny's last-gasp penalty. This game was full of them!
Villain of the match: There's two of them — Bradley Davies and Stephen Ferris, with the latter's brain implosion ultimately proving very costly indeed.
The scorers:
For Ireland:
Tries: Best, Bowe
Cons: Sexton
Pens: Sexton 3
For Wales:
Tries: J Davies 2, North
Cons: Halfpenny
Pens: Halfpenny 2
Ireland: 15 Rob Kearney, 14 Tommy Bowe, 13 Fergus McFadden, 12 Gordon D'Arcy, 11 Andrew Trimble, 10 Jonathan Sexton, 9 Conor Murray, 8 Jamie Heaslip, 7 Sean O'Brien, 6 Stephen Ferris, 5 Paul O'Connell (capt), 4 Donncha O'Callaghan, 3 Mike Ross, 2 Rory Best, 1 Cian Healy.
Replacements: 16 Sean Cronin, 17 Tom Court, 18 Donnacha Ryan, 19 Peter O'Mahony, 20 Eoin Reddan, 21 Ronan O'Gara, 22 David Kearney.
Wales: 15 Leigh Halfpenny, 14 Alex Cuthbert, 13 Jonathan Davies, 12 Jamie Roberts, 11 George North, 10 Rhys Priestland, 9 Mike Phillips, 8 Toby Faletau, 7 Sam Warburton, 6 Ryan Jones, 5 Ian Evans, 4 Bradley Davies, 3 Adam Jones, 2 Huw Bennett, 1 Rhys Gill.
Replacements: 16 Ken Owens, 17 Paul James, 18 Andy Powell, 19 Justin Tipuric, 20 Lloyd Willians, 21 James Hook, 22 Scott Williams.
Referee: Wayne Barnes (England)
Philippe Saint-André's team ran four tries past their visitors for a comfortable win although the scoreboard belies the quality of the Italian performance.
Stuart Lancaster's new-look team claimed England's first win in the Scottish capital since 2004 but the result had less to do with a new-era of creativity that English fans had been hoping for than the hosts' inability to convert their chances into points.
The result made it four wins in a row for Australia over Wales, as they backed up their victory when the teams last met in the RWC bronze final, and extended the hosts' poor record against the Tri-Nations to just one success in sixteen Tests.
As expected, running rugby was the order of the day but in the end the Wallabies were more clinical in the execution of their moves and were rewarded with eight tries against the men in black and white hoops.
Les Bleus were a completely different side to the one that had fallen to the 2011 hosts and also Tonga during the Pool stages. And they pushed the Kiwis right up until the death in a highly-charged 80 minutes at Eden Park on Sunday.
Both sides crossed the whitewash twice, with Wales bagging a consolation second try on full-time to end the match -- but not the tournament -- on a high note.
The hosts -- the only unbeaten team left in the tournament -- will face France at the same venue in seven days in a repeat of the 1987 RWC final.
Did they deserve it for the way they played against fourteen men? No. But that is rugby as Wales bow out following what was a superb tournament.
The All Blacks were far from their best but teams seldom are in knockout rugby. What may be a concern to them though was the loss of Colin Slade to injury. Dan Carter's fly-half replacement left the field during the first stanza with a leg injury, being replaced by third-choice Aaron Cruden.
The Wallabies scored the only try of the game but needed a late James O'Connor penalty to scrape past the dominant Springboks.
England were second best as they could not make it three finals in a row, while les Bleus deservedly march on to face Wales next week.
In what was a breathless encounter in the New Zealand capital, the Welsh outscored Ireland by three tries to one to seal a semi-final spot on rugby's biggest stage for the first time since 1987.
There was little to separate the two nations at the break with three Ronan O'Gara penalties edging Mirco Bergamasco's two. But after their rest, the Irish stepped up through the gears in Dunedin.
Wales secured a four-try bonus point in the first half of a one-sided affair and will now face either Australia or Ireland in Wellington next Saturday.
Wing Zac Guildford grabbed four tries as Canada were unable able to cope with the pace at which New Zealand launched attack after attack.
Any hope Scotland may have had of sneaking into the last eight through the back door, was shut in their face following the Pumas' three tries to one victory in Pool B.
As it was, Scotland are looking at returning from New Zealand early as they await the result of Argentina's fixture against Georgia on Sunday. The Scots need the Lelos to cause an upset of Tongan proportions in Palmerston North.