Crewe boss Dario Gradi knows his side must improve defensively if they are to halt their poor start to the season.
Alex have lost all three of their games in all competitions this season.
Following the 2-1 home defeat to Gillingham, Gradi said: " We looked totally lost and uninspired at one point but we got ourselves going, got back in it and did enough to even win it by the end.
"We've got a big problem at the back. We are shipping too many goals. But I can't do much about that at the moment.
"I've got to find some players by the end of August but the budget doesn't allow for that so I'm not sure where we are going to get them from.
"We've lost all three games we have played but it will do us no good if they go around feeling sorry for themselves."