MELBOURNE has turned on the jets after a slow start to register a 32-point win over North Melbourne.

The high-flying Demons trailed by 33 points early in the second quarter to second-bottom North Melbourne before running out 15.13 (103) to 10.11 (71) victors at Blundstone Arena on Sunday.

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But they have a nervous wait determining the severity of an ankle injury to Harrison Petty, who left the field in the third quarter and didn't return.

Petty had earlier kicked two goals on the back of a six-goal haul against Richmond last round.

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Melbourne's Kysaiah Pickett provided a spark, kicking three goals including a miraculous left-foot effort from the left boundary line, and a fleet-footed snap.

Pickett picked up two goal assists, while teammates Alex Neal-Bullen and Kade Chandler also slotted three goals.

00:48

The win was Melbourne's fifth in a row and its largest comeback win of the year, with three regular-season fixtures remaining before the finals.

The Demons moved to second on the ladder, but could shift down to third if Brisbane beat Fremantle on Sunday afternoon.

NORTH MELBOURNE       5.5     8.8     9.9     10.11  (71)
MELBOURNE                   1.3      8.4    14.7    15.13  (103)

GOALS 
North Melbourne: Ford 3, Goldstein 2, Scott, Larkey, Curtis, Simpkin, Taylor
Melbourne: Pickett 3, Neal-Bullen 3, Chandler 3, Petty 2, Petracca 2, Van Rooyen 2

BEST 
North Melbourne: Ziebell, Ford, Simpkin, Davies-Uniacke
Melbourne: Pickett, Petracca, Brayshaw, Hunter 

INJURIES 
North Melbourne: None
Melbourne: Petty (ankle)

SUBSTITUTES 
North Melbourne: Charlie Lazzarro (replaced Robert Hansen jnr in the third quarter)
Melbourne: Michael Hibberd (replaced Harrison Petty in the third quarter)

Crowd: TBC at Blundstone Arena