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Full-time: Argentina 27-25 Wales
80+7 mins: Wales launch one last counter from a penalty in their own 22, but are penalised for holding on in the tackle. Referee Alain Rolland signals the end of the match, consigning Wales coach Gareth Jenkins to a defeat in his first game in charge.
80+5 mins: There is still time left but Argentina claim the kick-off and camp down in the Welsh 22.
80+3 mins: TRY Argentina 27-25 Wales
Wales launch a break-out through Jamie Robinson and James Hook marks his debut with a try, holding off several tacklers to score at the posts. Nicky Robinson quickly adds the conversion.
80 mins: Wales create an opening for Chris Czekaj, just on as a replacement, but the wing is off balance and puts a foot in touch.
77 mins: TRY Argentina 27-18 Wales
Argentina go for the kill and are rewarded when replacement Francisco Leonelli scrambles over after a series of close-range charges. Federico Todeschini's conversion looks to have put the game beyond Wales.
76 mins: Wales do well to turn over ball after a sustained series of Argentine attacks, but James Hook's clearing kick goes out on the full, giving the hosts a scrum on the Welsh 22.
73 mins: Hibbard fails to find the target at his first line-out, allowing Argentina to relieve the pressure.
71 mins: Wales bring on replacement hooker Richard Hibbard for his debut, in place of Matthew Rees.
70 mins: Shane Williams again bamboozles the Argentine defence with his dancing feet on a mazy run, but is collared before releasing the ball and forced into touch.
68 mins: Argentina centre Gonzalo Tiesi is forced off with a leg injury, while replacement Pablo Gambarini also enters the fray.
65 mins: PENALTY Argentina 20-18 Wales
Argentina prop Rodrigo Roncero is sent to the sin-bin for infringing at a ruck, and Nicky Robinson narrows the gap to two points with another good kick.
62 mins: PENALTY Argentina 20-15 Wales
Wales finally get some reward for their second-half endeavours when Nicky Robinson knocks over a straightforward penalty.
60 mins: Mike Phillips takes a quick tap penalty and beats two tacklers, but again Wales again fail to capitalise as Mark Jones opts to take a tackle rather than passing to the man outside him.
58 mins: Shane Williams breaks two tackles to set off on a 60m counter-attack before releasing Jamie Robinson, but the move breaks down on the Argentine 22 when Williams' pass is knocked on by James Hook.
56 mins: Argentina reassert themselves and create a position for Juan Martin Hernandez to try a drop-goal, but his attempt is narrowly off target.
54 mins: Wales move the ball swiftly along the backline to put Mark Jones in space, but the wing is forced into touch.
52 mins: Matthew Watkins is forced off the field with a leg injury, and Neath youngster James Hook enters the fray for his Wales debut.
51 mins: Diminutive Wales wing Shane Williams starts to see a bit of ball, but is quickly shackled. But Nicky Robinson's floated pass allows Popham another charge up the right touchline before Argentina clear.
49 mins: Alix Popham, back on the field after his yellow card, makes a good charge through the middle as Wales enjoy a spell of possession.
48 mins: Wales lock Ian Gough requires more treatment, this time to an eye injury.
46 mins: Wales fly-half Nicky Robinson tries another long-range penalty, but again is narrowly off target.
44 mins: Wales centre Jamie Robinson launches a counter attack with a neat chip-and-chase down the right flank but is forced into touch.
42 mins: Wales flanker Gavin Thomas returns from the sin-bin, but Wales are still a man down.
1942 BST: Wales fly-half Nicky Robinson kicks off the second half.
Wales manager Alun Phillips: "The first 30 minutes pleased us greatly but the last 10 spoiled the first half. Having two off the field cost us dearly. But if we can get quick ball, we are still well capable of winning this game."
Half-time: Argentina 20-12 Wales
40+3 mins: PENALTY Argentina 20-12 Wales
The Pumas extend their lead when Federico Todeschini bangs over another penalty with the last kick of the half.
40+2 mins: Nicky Robinson attempts a long-range penalty, but pushes his kick narrowly wide of the left-hand upright.
40 mins: TRY Argentina 17-12 Wales
Argentina immediately profit from an under-manned Welsh pack with an attacking scrum that leads to a simple run-in for wing Jose Maria Nunez Piossek in the right corner, Federico Todeschini adding the conversion.
39 mins: Alix Popham's reprieve is brief as he becomes the second Welsh player to be sin-binned for bringing down a maul.
37 mins: Wales number eight Alix Popham is fortunate to escape censure after taking out Argentine hooker Mario Ledesma off the ball, allowing Pumas full-back Juan Martin Hernandez to boot the penalty into touch deep in territory.
35 mins: Argentina are trying to make the most of their extra man but lock Ignacio Fernandez Lobbe, who plies his trade with Sale, is penalised for a double movement as he scrambles towards the Welsh line.
32 mins: PENALTY Argentina 10-12 Wales
Wales flanker Gavin Thomas is yellow-carded for infringing at a ruck and Pumas fly-half Federico Todeschini compounds the punishment by slotting a penalty.
30 mins: Wales full-back Lee Byrne and fly-half Nicky Robinson launch a counter attack from their own 22 but it comes to an end when his brother Jamie, playing at centre, is penalised for holding on in the tackle.
26 mins: Argentina are getting on the wrong side of Irish referee Alain Rolland, who issues a final warning after another ruck offence.
24 mins: Wales scrum-half Mike Phillips misses Nicky Robinson with his pass but Matthew Watkins shows good innovation to launch a cross-field kick that just eludes Mark Jones.
21 mins: Argentina prop Rodrigo Roncero concedes a penalty with the Pumas attacking in the Wales 22, allowing Nicky Robinson to clear to safety.
18 mins: There is a brief pause for breath as Wales lock Ian Gough requires treatment to a hand injury.
10 mins: TRY Argentina 7-12 Wales
The frenetic opening continues as debutant Wales lock Ian Evans scores a remarkable try, intercepting an Agustin Pichot pass and galloping 60m to touch down under the posts, giving Nicky Robinson an easy conversion.
6 mins: TRY Argentina 7-5 Wales
Argentina hit back immediately as Juan Martin Fernandez Lobbe charges down the right, throws a pass inside which bounces off Mike Phillips and Juan Manuel Leguizamon touches down, Federico Todeschini converting.
5 mins: TRY Argentina 0-5 Wales
Wales' pressure is rewarded as Nicky Robinson floats a long pass out to the left and wing Mark Jones finishes smartly in the corner. Robinson misses the conversion from wide out.
4 mins: Nicky Robinson launches a high kick which Pumas full-back Juan Martin Hernandez drops, giving Wales an attacking scrum.
2 mins: Wales start strongly, moving the ball along the line, and win a penalty which Nicky Robinson kicks to touch.
1845 BST: Argentina kick off.
A full Raul Conti Stadium has a party atmosphere in sunny Puerto Madryn, with barbeques and sunglasses the order of the day as the crowd awaits kick-off.
Both sides are out on a decent-looking pitch normally used for football, lining up for the national anthems.
New skipper Duncan Jones leads Wales for the first time as an inexperienced side aim to upset Argentina
Argentina are without several senior players based in France, but 11 of the starting line-up ply their trade there.
Argentina: Juan Martin Hernandez (Stade Francais, Fr); Jose Maria Nunez Piossek (Bayonne, Fr), Gonzalo Tiesi (London Irish, Eng), Rafael Carballo (Toulon, Fr), Lucas Borges (Stade Francais, Fr); Federico Todeschini (Beziers, Fr), Agustin Pichot (Stade Francais, Fr; capt); Rodrigo Roncero (Stade Francais, Fr), Mario Ledesma (Clermont Auvergne, Fr), Martin Scelzo (Clermont Auvergne, Fr), Ignacio Fernandez Lobbe (Sale Sharks, Eng), Rimas Alvarez Kairelis (Perpignan, Fr), Juan Martin Fernandez Lobbe (Liceo Naval), Juan Manuel Leguizamon (London Irish, Eng), Gonzalo Longo (Clermont Auvergne, Fr).
Replacements: Marcos Ayerza (Newman), Pablo Gambarini (CASI), Santiago Sanz (CASI), Martin Schusterman (Leeds Tykes, Eng), Nicolas Fernandez Miranda (Hindu), Francisco Leonelli (Edinburgh Gunners, Sco), Federico Serra Miras (SIC).
Wales: Lee Byrne (Ospreys); Mark Jones (Llanelli Scarlets), Jamie Robinson (Cardiff Blues), Matthew Watkins (Llanelli Scarlets), Shane Williams (Ospreys); Nicky Robinson (Cardiff Blues), Mike Phillips (Cardiff Blues); Duncan Jones (Ospreys, captain), Matthew Rees (Llanelli Scarlets), Adam Jones (Ospreys), Ian Gough (Newport Gwent Dragons), Ian Evans (Ospreys), Alun Wyn Jones (Ospreys), Gavin Thomas (Llanelli Scarlets), Alix Popham (Llanelli Scarlets).
Replacements: Richard Hibbard (Ospreys), Rhys Thomas (Newport Gwent Dragons), John Yapp (Cardiff Blues), Gareth Delve (Bath Rugby), Andy Williams (Bath Rugby), James Hook (Ospreys), Chris Czekaj (Cardiff Blues).
Referee: Alain Rolland (Ireland).