Wales captain Sam Warburton could go in to the 2014-15 season without a club to play for after contract disputes between the four regions and the Welsh Rugby Union, reports BBC Sport.
Warburton - who helped the British and Irish Lions to their first series win for 26 years back in 2013 - signed a central contract with the WRU in January after failing to reach an agreement with Cardiff Blues.
Cardiff Blues, Scarlets, Dragons and Ospreys signed an agreement that stopped them selecting players on a central contract such as the 25-year old.
However, at the time that Warburton signed his deal, it was believed that he could play for the Blues whilst the WRU payed his salary.
Talks have stalled
The Regional Rugby Wales (RRW) confirmed that the agreement was legally binding and that they would continue to honour it.
This came after talks aimed at resolving the dispute over money and the release of players for club duty stalled, and it is now unclear what the future holds for one of Wales' best know players.
In a letter to the WRU, the RRW said: "We have compromised and notwithstanding significant misgivings from a number of us have agreed to your demands for national dual contracts."
Warburton was confident only last month that he would be able to play for the Cardiff Blues but the continuing issues between the two organisations could mean that the regions refuse to let players contracted them represent Wales when they face South Africa in November.
The last "participation agreement" ended at the end of June and it is not known how long the dispute could continue for.
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