The Brazil international has fallen down the pecking order as a result, making just 11 Premier League starts this season, although he was back in the starting XI on Sunday due to injuries and illness as United lost at Tottenham.
Defeat to Tottenham left the Red Devils 15th in the Premier League table with just eight wins from 25 league games, in which they have scored 28 goals.
Speaking about his future with the Red Devils, Casemiro said he intends to keep working hard to get back into the first team and wants to remain with the club next season.
Next up for Amorim and his team is a trip to in-form Everton on Saturday in the Premier League after the Toffees overtook the Red Devils in the table over the weekend.
With the Red Devils captain departed from the centre of the pitch and the pair of Alejandro Garnacho and Joshua Zirkzee behind striker Rasmus Hojlund, Casemiro was regularly left largely along to patrol the midfield, which is a huge ask of him.
