Martinez is on the final stretch of rehabilitation after undergoing knee surgery in February.
As United fans know, Licha has an innate passion and fight in the way he plays, and that translates to his training mentality, too, including in injury recovery.
Casemiro was keen to praise Martinez for his work ethic.
“Licha is on the final straight,” the 32-year-old explained, smiling at the slamming noise of Martinez working out on one of the Carrington gym’s many machines.
“He is a soldier who works so hard. He is always in the gym working hard. He is a machine that works so hard.