Sanchez is Argentina's latest surprise packet

Nicolas Sanchez has moved from a bit-part player in the French Top 14 to a central role in Argentina's charge into the World Cup semifinals.

The fly-half, 26, doesn't cut the biggest figure on a pitch often dominated by giants, standing 1.77m (5ft 10in) and weighing 83kg, but he punches well above his weight.

Sanchez booted five penalties and four conversions, missing just one kick at goal, as Argentina ran in four tries to see off Six Nations champion Ireland 43-20 in Sunday's quarterfinal at Cardiff's Millennium Stadium.