In the not so distant past, Alexis Sanchez was known for his speed and energy.
At Arsenal it was not uncommon for the Chilean defenders to pass the defenders.
However, since joining Manchester United last January, he has struggled to get his best form, often reminiscent of a shadow of his foaming former self.
It has led to proposals that the 29-year-old burnout suffers.
Before moving to Old Trafford, he consistently played more than 50 matches per season for club and country for a decade.
Many believe that it has taken its toll.
One recent piece of evidence that seems to support these allegations is that he was beaten by Juan Mata, a non-tempo player, in a sprint test.
According to the Independent, this can be attributed to wear and tear.
Sanchez is currently eliminated in the new year after suffering a thigh injury in training.
United's boss, Jose Mourinho, said in November about the shape and future of the player.
When asked if he wanted to leave, he said, "I do not think so, because he never told me he wanted to go or did not like to stay.
"Like the team. He improves as the team improves, and when he plays, he gives us his personality, his desire to play and to produce for the team.
"He tries to adapt to our game and vice versa. Can he do better? I think we can do better. I can do better, he can do better and all the other players can do better. "