Javier Hernandez is unhappy at being marginalised by David Moyes at Manchester United.
Moyes, already under pressure with United NINE points adrift of fourth spot, has angered Hernandez by continually overlooking him, according to Mexico coach Miguel Herrera.
Herrera, speaking to ESPN's Raza Deportiva, said: "Chicharito is frustrated because the current coach doesn't give him many minutes, but he continues to be very committed."
The striker, 25, has become an increasingly peripheral figure under Moyes and published a cryptic statement on his Instagram account following the Red Devils ' 2-2 home draw against Fulham.
"The time to speak about so many things will come," wrote Hernandez.
The forward is expected to leave Unites this summer after becoming disillusioned with his lack of playing time under Moyes.