He already has 22 caps for Los Pumas and Wales will have to be on their mettle to deal with the 17 stone powerhouse .
Isa is a powerful back - rower and at the tender age of 23 , can still improve .
Isa already has 22 caps for Los Pumas and Wales will have to be on their mettle to deal with the 17 stone powerhouse .
Isa is a powerful back - rower and at the tender age of 23 , can still improve .