The Magpies began their season with a 3-0 hammering at Coventry City, but an impressive display at Scunthorpe United in the League Cup in midweek, following eight changes, has given the gaffer food for thought.
Nolan admits he does not know who he will be selecting for Saturday's game against Chesterfield at Meadow Lane, but is happy to know that every player will have to be at the top of their game.
"All the lads are going home not knowing whether or not they will be in the team on Saturday," he told the official club site.
"I don't know my team yet. I'm going to have a meeting with my coaching staff and will have to make tough decisions, but that's what I want.
"There will be 11 lads who will have earned the shirt on Saturday but they have to keep it because they have others breathing down their neck for their position."
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