Manchester United manager Jose Mourinho admits it hurts him to leave players out of his matchday squad, and insists he will not force any fringe players out of the club.
The Red Devils boss has regularly rotated his squad this season in a bid to keep his players fresh, and recently handed a surprise recall to the first-team squad for midfielder Bastian Schweinsteiger.
The former Germany international has been tipped to depart the club for much of the campaign, but Mourinho has indicated that unhappy players will have to force the issue if they wish to depart the club.
The likes of Memphis Depay, Ashley Young, Marouane Fellaini have fallen out of favour in recent weeks, while doubts remain over the futures of Matteo Darmian, Morgan Schneiderlin and Marcos Rojo.
"I will not push anyone because nobody deserves that," Mourinho said. "The way they work, they don't deserve that.
"On Wednesday I was in my hotel and my assistants came here to train the group of five who were not selected and stayed here. They told me what I expected — amazing effort, amazing commitment, amazing professionalism.
"Memphis Depay, Ashley Young, Marouane Fellaini — the people who stay here were fantastic.
"It hurts me not to select them, so you see that sometimes I do a little bit of rotation. One day I play one, another day I leave one at home, then put one on the bench.
"Nobody deserves to be pushed, for me to say 'it's better for you to leave.'
"I have to understand that frustration is something that comes to the players now and again in certain moments of their careers and seasons.
"Frustration is something that arrives and we will analyse it if anyone who shows me that frustration has a desire to leave.
"For me, it's very comfortable to have all of them. But it hurts me."