Chris Morgan insists places are up for grabs ahead of Friday's play-off semi-final first-leg tie with Yeovil Town at Bramall Lane.
Since assuming responsibility of first-team affairs and with a play-off place assured before the end of the campaign, Morgan experimented with the side and gave a number of youngsters a chance to impress ahead of the meeting with the Glovers.
Speaking ahead of the first-leg clash, Morgan revealed his team will be picked on merit: "I don't have a preference of going with youth or experience, for the next two games I will pick a team that I feel is best equipped to win each fixture.
"Since I took charge all the players have been told that they had something to offer the squad and the majority of them have been utilised in the last five matches.
"The next two games are massive, that goes without saying, given what is at stake for the winner.
"What pleases me is that in the next 24 hours I will have some tough decisions to make, I want healthy competition in the squad and at the moment we have it. If you have players pushing for a place it means the other lads will have to maintain high standards to keep their place in the team. Ahead of such a big game you couldn't ask for anymore."
United's leader is refusing to think about previous play-off heartache, instead urging everyone to be positive about the challenge that lies in wait over the next few days.
He added: "No play-off campaign is the same, we have been there before, but this one promises to be a new experience for all involved.
"This is another opportunity, history is in the past and you can't change that, what we can do is affect the future. Everyone knows this club's record in the play-offs, but this time we have to believe we can go one better.
"We have known for a week or so where we will be and that has helped the players' mindset."