Real Betis and Sevilla could both turn to Estadio La Cartuja as a temporary home in 2027/28 while their respective stadium redevelopment projects take place.
Andalusian Football Federation president Pedro Curtido has floated the possibility of the fierce city rivals sharing the 72,000-capacity venue.
What has been said about Betis and Sevilla sharing La Cartuja?
Curtido believes there is a case for both clubs using La Cartuja, pointing to examples of European teams sharing stadiums.
Speaking on Canal Sur's La Jugada, he said: “It could be Sevilla's stadium or Betis's. Why not both?”
However, the RFAF president acknowledged that the decision was not his to make, with no agreement currently in place between the clubs.
The proposal comes at a potentially complicated time for both sides.
Betis have been playing at La Cartuja while Benito Villamarin undergoes redevelopment, with work expected to continue until summer 2028. The club intends to return for the start of the 2028/29 season.
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Sevilla, meanwhile, have considered beginning redevelopment of Ramon Sanchez-Pizjuan in June 2027, meaning they could require a temporary home throughout the 2027/28 campaign.
That creates a potential clash, with both clubs needing access to La Cartuja during the same season.
Sevilla president Jose María del Nido Carrasco has previously identified the stadium as the club's preferred temporary home, expressing confidence that the Andalusian regional government would help facilitate the move.
Betis president Angel Haro, however, has indicated that sharing the venue simultaneously would be difficult.
He suggested Sevilla could use La Cartuja once Betis have returned to Benito Villamarin, adding that he expected Sevilla to pay the same rent as his club.
FGG says: Sharing La Cartuja would test Seville's stadium ambitions
The prospect of two major rivals sharing a 72,000-seat stadium is intriguing, particularly given the logistical challenge of accommodating two home schedules during a major redevelopment.
La Cartuja offers an obvious solution on paper, but the clubs would need to agree on scheduling, access and financial arrangements before the proposal could become reality.
Betis already have a plan to return to Benito Villamarin, while Sevilla must determine how to manage their own stadium works.
Asking either club to compromise on its arrangements could prove difficult.