Former Western Sydney striker Joey Gibbs hit a double as the Demons stunned the Mariners, after taking a 2-0 lead.

Kwabena Appiah-Kubi dragged the Mariners level with a brace, but Gibbs was the hero with the winner.

Sydney FC cruised past Darwin Rovers 8-0, while Gold Coast City accounted for Western Knights 3-1.

Moreton Bay United and Broadmeadow Magic's clash finished 2-2 after 90 minutes and went to extra-time.

PIC SPECIAL: FFA Cup last 16 matchday three pics

Blacktown City v Central Coast Mariners

Paul Okon's side were bundled out by NPL opposition in the Round of 32 for the second season, despite Appiah-Kubi's brilliant double.

Gibbs was the hero after netting on two minutes, with Giorgio Speranza doubling their advantage on 17 minutes.

The 25-year-old ex-A-League player netted the winner on 82 minutes.

Darwin Rovers 0 Sydney FC 8

The Sky Blues eased past the Northern Territory's sole participant with Bobo netting four goals. After a goalless opening 20 minutes, the Brazilian struck twice, before David Carney made it 3-0 before the break.

Stand-in skipper Matt Simon, Jordy Buijs and Milos Ninkovic added further goals in the second 45, before Bobo added two more to seal a comprehensive triumph.

PIC SPECIAL: FFA Cup last 16 matchday three pics

PIC SPECIAL: FFA Cup last 16 matchday three pics

Gold Coast City 3 Western Knights 1

The Glitter Strip club advanced to the last 16 with a comfortable 3-1 win over WA's Western Knights.

Jarrod Kyle was the hero with a hat-trick, having opened the scoring on nine minutes. Kyle added two further goals in the second half, before the Knights netted a consolation via James Burns in stoppage-time.

Moreton Bay United 4 Broadmeadow Magic 2

The NPL Queensland club progressed in extra-time, coming from behind to beat the NSW Newcastle club 4-2 after finishing 2-2 after 90 minutes.

Dino Fajkovic opened the scoring for the Magic on 18 minutes, only for United to score twice within three minutes in the second half via Alex Janovsky and Lachlan Strogusz.

Kale Bradbury equalised from the penalty spot in injury-time but Fajkovic's red card left them in trouble. Paul Mikula and Declan Smith netted in the second period of extra-time to seal the win.

PIC SPECIAL: FFA Cup last 16 matchday three pics