After the success of Tonga and Fiji at the recent Rugby League World Cup, there are calls for World Rugby to loosen eligibility rules, allowing capped players to return for tier-two nations.
Charles Piutau has told the Daily Mail that administrators need to match the laws used by their rugby league counterparts.
Is Union heading down the same path as league, with Tier one international players now set to turn out for Tier two teams? And which star players could switch allegiances? RUCK.co.uk takes a look.
1. Charles Piutau
The Bristol-bound outside back could easily be regarded as the most talented players to have come through the ranks in New Zealand rugby, only to go on to slip through the cracks and head to Northern Ireland. He would surely be too irresistible of an option for Tonga to let slide by.
2. Semesa Rokoduguni
The fijian flier has struggled to become a regular under Eddie Jones, making his best shot at going to a World Cup perhaps with the country of his birth, Fiji. A world-class try-scorer, Rokoduguni deserves the chance to show off his talents on the world stage.
3. Malakai Fekitoa
Having exiled himself from All Black selection by joining European giants Toulon, the rampaging centre could be a key player in the Tonga team if allowed. He was not initially selected for the All Blacks in 2017 for the British and Irish Lions Tour but was called up for the third test match after Sonny Bill Williams got sent off.
4. Tendai Mtawarira
More popularly known as ‘The Beast’, Mtawarira was born in August 1985 in Harare, Zimbabwe. And with Zimbabwe this week revealing their plans to qualify for the 2019 Rugby World Cup, having Mtawarira among their ranks would be a major boost.