Last season s beaten A-League Grand Finalists Melbourne City suffered their first loss of the season at the hands of Adelaide United.
City had started the new campaign with a 1-0 win at Brisbane Roar but Sunday s game turned on the dismissal of Scott Jamieson in the 65th minute for two yellow cards.
A poor challenge on Yaya Dukuly saw the left-back given his marching orders and from the subsequent free-kick Louis D Arrigo pulled the ball back for Tomi Juric to stroke home.
Captain Stefan Mauk doubled Adelaide s lead in the 76th minute as they claimed their first triumph of the 2020-21 season.
Central Coast Mariners have not won more than six games in a season in each of the past six campaigns but now have two wins from two this year after a 2-0 victory at newcomers Macarthur.
Expansion team Macarthur made a winning start to life at Western Sydney Wanderers, yet goals from Daniel De Silva and Jordan Smylie brought them back down to earth this time around.