Mansfield boss Billy McEwan has warned his players he may bring fresh faces to Field Mill after the side notched up three league defeats in a row.
The Stags suffered a 1-0 defeat at Burton Albion on Monday.
McEwan told BBC Radio Nottingham: "There are a few who need to show a bit more desire than they showed out there and have got to do better.
"The squad's not the biggest in the world, so we've got to get new players in. We need the competition."
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McEwan, who said he has money set aside to boost the squad, added: "We need the challenge and players have to be looking over their shoulder."
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