Manchester United boss Erik ten Hag defended his substitutions during their 1-1 draw with Burnley.
Rasmus Hojlund and Kobbie Mainoo came off on 65 minutes with boos ringing around Old Trafford.
Ten Hag explained: It was the right decision and totally logical to bring off very young players who are in their first year of the Premier League and feel some fatigue.
We have some very young players and that's why we built this club back. That takes time, and we build this by bringing in young players. Hojlund, [Alejandro] Garnacho, Mainoo - they are all in the first season of the Premier League and the league gets more intense year by year.
I am very impatient but there we need patience and the fans need patience. We have built a team and they need experience."
The manager added: The great Manchester United teams, we forget they were also built. I have seen I think in 2004-05 they also didn't play that great football.
They were building, and it takes time, but everyone forgets, even the players who were by that time in the team, they forget they were struggling and that they needed time to progress."
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