Morgan is nursing various knocks and niggles and has missed the last three games while fellow defender Hessey has yet to feature this season because of a knee injury.
Forward Ben Wright is nursing a back problem and will undergo a late fitness test while striker Matthew Tipton will also be assessed.
Last weekend's home defeat to Lincoln ended a run of three matches undefeated for the Silkmen and Alexander has urged his side to respond strongly at Whaddon Road.
He said: "It's good that we are creating chances but as a team we recognise that we have to be sharper in front of goal."
The match kicks off at 7.45pm.
Source: Team_Talk