■By STEFFAN THOMAS

WAYNE Pivac has told Wales they need to brush up their game if they are to win their Argentina series.
Despite holding a oneman advantage for 51 minutes of their first meeting with the Pumas in Cardiff, Pivac’s side were held to a 20-20 draw and produced a disappointing display.
The hosts failed to take advantage of a red card to Pumas full-back Juan Cruz Mallia who was sent off after a reckless high tackle on Kieran Hardy.
Wales were dominated physically and their scrum was a major issue ahead of the two teams meeting once again.
“We’re disap...