Manchester United midfielder Scott McTominay says manager Ole Gunnar Solskjaer plays no favourites.
United's 4-0 win over Chelsea on Sunday featured a starting XI with an average age of 24 years and 227 days - the youngest average of any of the 20 teams in the opening weekend.
The Scottish midfielder said: "There's no first name on the team-sheet and there's no given they'll play in every match - that's the sign of a healthy dressing room.
"Age is just a number. When you see [Paris St-Germain's] Kylian Mbappe and [United team-mate] Marcus Rashford play at such a young age, doing amazing things it's a credit to them. They just play."