The 19-year-old has started 15 Premier League matches this season, including Southampton's last three, after being left out of the starting XI since late December beforehand.
|15/2||Southampton are 15/2 with Paddy Power to beat Manchester City this weekend|
"I trust the manager in what he is doing," he told reporters.
"He may need to take me out for a few games to give me a bit of a rest and I think he did that at the right time.
"I felt when I came back into the team, starting the last three games, I felt fit, fresh and replenished again. I think it was good management by the gaffer.
"For me, to be in and around a Premier League set-up at my age is unbelievable but to get the games that I have had and all the starts I have had has been good.
"Obviously, now I am trying to nail down a permanent place in the team but that is difficult when you've got such quality players in the squad.
"It is difficult when you're not playing - we as footballers want to play every minute of every game, but you've got to understand it is a long, tough season and obviously I am young."