Rob Edwards named a strong side at Blundell Park and made just one substitute, in the 88th minute, as his players scrapped their way to victory in harsh conditions and against stubborn opposition.
The head coach now has to decide whether he rests some players, with a trip to Crystal Palace coming up at the weekend, or to take a risk on a few in order to name his strongest possible side against the Gunners.
Jose Sa is expected to come back in between the sticks in an easy change to predict, while Edwards may change his wing-backs again to bring Rodrigo Gomes and Hugo Bueno back in.