Sevilla president Jose Castro says Steven N'Zonzi will only leave for the right price.

The French midfielder is interesting Arsenal and Liverpool ahead of the January market. N'Zonzi was snapped in London this weekend.

Castro cannot rule out selling N'Zonzi next month.

"Surely there is a solution and if there is no solution, it's his obligation to stay here," said Castro.

"The team is focused, the entity has strong structures and no one will forget that N'Zonzi is a player of Sevilla.

"He has two and a half seasons left with the club."