Amorim has acknowledged that his job security is at risk following the team's recent defeat to Manchester City.
In an interview, Neville stated that he is worried about the upcoming weeks and the team's performance.
Neville believes that Manchester United cannot afford to fall behind in the league table, especially considering the significant investment made in the team during the off-season.
He emphasized the importance of a quick turnaround in results, stating that the team needs to start winning games soon.
Neville also pointed out that a loss to Chelsea next week could put the team in a difficult position, potentially dropping them to 15th or 16th in the table.
He noted that the team has already spent £200 million on player transfers and has had a full pre-season, making it crucial for them to achieve results quickly.
Neville thinks that the manager's ideas need to be implemented effectively with the players, and a rapid improvement is necessary to avoid a decline in the team's performance.