The two clubs intensified talks yesterday for Acuna, 28, with the last remaining obstacle being a fee.
Sporting want €15m for the talented left-back while Sevilla have offered closer to €10m.
The final amount should be somewhere or €10m plus add-ons that would take the final fee close to what Sporting want.
According to A BOLA, an official announcement could arrive between today and tomorrow.
Acuna’s move to Sevilla would almost certainly put an end to any prospect of Sergio Reguilon returning.
Acuna, a 27-time Argentine international, would be a direct replacement for Reguilon in the left-back position.