Defender Silvio Spann says Wrexham must improve or new players will be brought in after the 2-1 loss to Kettering.
"If we can't do it the gaffer [manager Dean Saunders] will have to look for some other [options]," said Spann.
Saunders railed at the Dragons' errors in defence following the Racecourse loss, calling the second goal "awful", and Spann was replaced on 66 minutes.
"It's always disappointing as player to leave the pitch prematurely," said the Trinidad & Tobago international.
"But if the gaffer has a plan you have to accept it as a man and as a professional think it's for the best because it's about the team, not about you."
Despite the defeat and the loss of their 100% home record, Spann says the club remains confident for the rest of the season and eager to put things right in Tuesday's game at Tamworth.
"It was a disappointing result but it's still early season," Spann told BBC Sport Wales.
"There's no need to drop our heads. There's homework to do in defence and attack, but the mood's pretty stable, heads are high and the ultimate goal is promotion.
"We'll go back to the drawing board for Tamworth, put a couple of things into practice and hope to get it right on Tuesday and make Wrexham happy once again."