Yannick Jauzion (France)
France might have won last season's Six Nations, but it is difficult to predict what level of performance the 2007 World Cup host will deliver.
Brilliant on its day, bewilderingly bad when things go wrong, France at least possesses a centre whose consistency ranks him among the finest midfield talents around.
Toulouse star Jauzion is good enough to make a major impact on the tournament, even in a team that might not match expectations.
But if his colleagues click as well, then even New Zealand will start sweating.