Barcelona's stadium Camp Nou could host the expected heavyweight title unification fight between Anthony Joshua and Joseph Parker, the New Zealander's promoters have said.
On Wednesday, Eddie Hearn - Joshua's representative - stated that a deal to fight Parker could "be in place within the next week or so".
The Principality Stadium in Cardiff and Twickenham have both been touted as potential venues, with Hearn keen to secure a huge venue for the bout.
And David Higgins, the founder and director of Duco Events who promote Parker, has now suggested that the fight may be held at Camp Nou, which has a capacity of 99,000.
"The reason I threw Barcelona out there, is because I know the English love to go to Spain and there will be a lot of expats in Spain," Higgins told Sky Sports.
"It's a short flight. That stadium is massive. They're not in need of tourists, they probably think they have too many, but if it's off the main tourist season then as an economic thing, it would stack up.
"A lot of English would go for a week in Spain. I'm throwing it out there as a possibility, without having any discussions with them.
"Like I said, we have got a track record. The Jeff Horn-Manny Pacquiao fight delivered a massive economic return and was seen I think as a wise investment."
Higgins added that Joshua's camp have asked for a rematch clause to be inserted into the contract.
"They said it was the bottom line, the rematch clause, and if Joseph had been flattened 10 times, I too would ask for a rematch clause," he added.
"Joshua does have big commercial pull, so they have every right to expect a bigger share of the pie, which we are giving them, and a rematch clause.
"We have confidence in our guy Parker and his chin. We think he wins."