Eduardo Berizzo could walk out on Sevilla after days into his appointment.
Estadio Deportivo says talks between Berizzo and Sevilla have broken down when they were nearly complete.
The Argentine coach is said to be angry at the attitude of Sevilla, who offered him less money than Celta Vigo put on the table for him to renew his deal at Balaidos (1.2m euros, double what he earned this season).
Berizzo now may listen to offers from elsewhere, including Portugal, with Porto interested in his services.