Suso and agent Mino Raiola are working to find him a new club in Italy, Spain or England, claim reports, as his time at Milan appears to be over.
The Spanish winger has been increasingly unpopular among fans and the arrival of Zlatan Ibrahimovic appears to have sparked a transformation.
Coach Stefano Pioli beat Cagliari 2-0 on Saturday with a 4-4-2 system, leaving Suso, Krzysztof Piatek and Lucas Paqueta on the bench.
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