Amorim said United had to be "strong and brave" in the summer transfer window and questioned his future if he cannot change the culture.

The Argentine came close to leaving in January following frustrations under Ruben Amorim, with both Chelsea and Napoli holding talks to sign him at the time, but a deal was not done. While Napoli remain keen, the asking price — believed to exceed £60million — may prove too steep for the Serie A side.