Last season’s treble winners Central Coast Mariners were knocked out in the first hurdle of the 2024 Australia Cup after suffering a shock 3-1 defeat after extra time away at National Premier League Victoria side Heidelberg United on Wednesday. Josh Pin’s powerful penalty gave the hosts the lead just before half-time at the Olympic Village football field in the Melbourne suburb of Heidelberg, but Mariners’ Mikael Doka responded swiftly after the break. Neither team managed to find a winner in regular time, leading the game into extra time, where Pin struck again to make it 2-1. In the final se…