The Stars Group has become the first operator to offer poker liquidity sharing in the regulated Portuguese market.
Players on its licensed PokerStars.pt site can now compete against their French and Spanish counterparts through the network.
"Adding Portugal to France and Spain will expand the pool of players in Southern Europe," The Stars Group chief executive Rafi Ashkenazi said.
"This is great news for players, who will benefit from larger player pools with bigger prizes, better promotions and a wider selection of games, which we hope will continue to deliver positive results in those markets."
The launch of cross-border poker has been facilitated by the signing of an agreement between the French, Italian, Portuguese and Spanish regulators in July 2017. France and Spain became the first countries to share players through this agreement in January this year.
The entry of Portugal into the liquidity-sharing agreement following the recent adoption of technical regulations leaves Italy as the only country still to join.
"Italian regulators have yet to confirm details of the country's involvement, but are expected to join the other countries next year," The Stars Group noted.
To celebrate the launch of shared liquidity in Portugal, PokerStars will host the Trio Series in June, a poker tournament offering a €5m guaranteed prize pool and a €500,000 main event.
Shares in The Stars Group Inc (TSX:TSGI) closed in Toronto Wednesday down 0.87 per cent at CAD$46.46 per share, less than 5 per cent off their 52-week high of $48.84 per share set on May 14th.