Casemiro and Lisandro Martinez have joined full-scale training at Manchester United.
Brazil midfielder has been missing since November 1, while Argentina defender Lisandro has been sidelined since September 20.
The pair have been working individually with staff in recent weeks.
But yesterday, Casemiro and Lisandro trained on the grass with the full squad to boost manager Erik ten Hag's options.
United are next in action against Wigan Athletic in the FA Cup on January 8.