Spain's footballers union threatened to strike over controversial plans to play a La Liga match in the United States, blasting a decision based only on "money and business".

"We are tired of these unilateral decisions that directly affect the players like this plan of playing outside Spain," said David Aganzo, the president of the players' union AFE, after a meeting attended by a host of stars including Real Madrid's Sergio Ramos and Barcelona's Sergio Busquets.

Spain's La Liga announced last Thursday that they planned to stage a match in North America as part of an expansion drive.

The teams and the venue were not disclosed but El Pais newspaper said the match would take place over the coming 2018-19 season and would probably feature either Barcelona or Real Madrid as one of the teams.

Aganzo said that the AFE planned to meet La Liga chiefs in September to try and convince officials to give up on the plan.   

If not, at the "end of September or the beginning of October we will have to start acting," said Aganzo, adding the union was "prepared to go to the end", evoking the possibility of a "strike". 

"We are used to seeing football played only for money and business," added Aganzo who said La Liga officials no longer take into account "the health and risk for the players".

“We’re all united, the union is strong and as our president has said, we all think the same way on this,” Busquets said in a video broadcast on Thursday on the AFE’s Twitter account.

“Together we are stronger and this (opposing the plans) is a path that we all want to take and we believe it’s what is best for football.”

In an interview with newspaper El Mundo on Thursday, La Liga president Javier Tebas ruled out the possibility that the league’s most famous game, known as “El Clasico”, between Real Madrid and Barcelona, would be one of the games played abroad.

“Logistically, playing the Clasico, at least the La Liga Clasico, in somewhere like New York is not viable,” he said.

(With input from agencies)