Casemiro is set for a hefty pay rise if Manchester United win the Europa League this month, according to a report.
The Brazilian's future at Old Trafford has been in doubt all season, with United keen to move his £375,000-a-week salary off the wage bill.
He looked to have falled down the pecking order under Ruben Amorim, who at one point opted for young Toby Collyer instead.
However, Casemiro has reasserted his importance at United in recent weeks after delivering commanding performances.
After a period of inconsistent form and speculation about his future, the Brazilian has been instrumental in United's Europa League campaign, with the midfielder contributing with two goals in the 7-1 demolition of Athletic Club in the semi-finals.