WALES head coach Wayne Pivac has laid down the law to Leon Brown and told the Dragons prop he must take his chance to impress when he makes a rare start against Argentina on Saturday. Tighthead Brown, 24, will win his 20th Test cap in the second of the back-to-back meetings with the Pumas in Cardiff and he has been a regular in Wales squads since 2017. But he has made only two starts in that time with his third set to come this weekend. With his best players on the British & Irish Lions tour of South Africa, Pivac is looking at the next generation.