But two minutes later the visitors' couldn't do much when Bay striker Angus Kilkolly latched on to a Nile Walyn cross from the right wing to the far post to drill it into the net for a 1-0 lead.
Phoenix opened up the Bay defence a few times, especially on the hosts' right flank but their finishing left little to be desired.
In the 79th minute, striker Saul Halpin couldn't believe his luck when he got a ball on the left flank but again the money shot wasn't up to standard. The top scorer looked a little lethargic on a cloudy day.
However, substitute Facundo Barbero didn't make a mistake three minutes later when the Argentine striker received a well-timed cross from the left flank from Fergus Neil, took a touch and poked it into the net past a diving Sail for a 2-0 lead.
The Bay play Southern United in a 2pm kick off at Forsyth Barr Stadium, Dunedin, this Saturday.