Kerr on target as Australia make winning start to Women's Asian Cup
The Chelsea forward opened the hosts' account in the 14th minute, but that was as good as it got despite dominating possession.
It was not the clinical performance they were looking for -- the last time the teams met in 2023, Australia won 8-0.
Victory nevertheless ensured three points in Group A as the Matildas began their mission to win the 12-team continental title for the first time since 2010.
"Everyone comes here to win, but we're just taking it one game at a time," said Kerr of their chances of winning the title.
"Today was a good start and there's lots of belief within the team. But there's a lot of quality teams in the Asian Cup, so you have to take one game at a time."
After the 44,379-strong crowd -- a record for the Women's Asian Cup -- was warmed up by American singer Audrey Nuna of "KPop Demon Hunters" fame, big cheers greeted the players when they emerged onto the pitch.
The Matildas took the lead in the 14th minute after a cagey start when Arsenal's Caitlin Foord got on the end of Clare Wheeler's cross and found Kerr who headed home from close range.
Emily van Egmond should have made it 2-0 minutes later, but the Leicester midfielder skied a free header over the bar.
A second goal seemed imminent and it appeared to have come from Hayley Raso, but her strike was ruled offside by the video referee and Australia went into the break with only a slender lead.
The Philippines are a team on the rise under Australian coach Mark Torcaso, winning gold at the Southeast Asian Games last year, and they doggedly hung on against a side packed with England-based players.
Goalkeeper Olivia McDaniel and their defensive unit were immense as Australia struggled to create any clear-cut chances in the second half and murmurs of discontent rippled through the crowd.
South Korea and Iran, who face each other on the Gold Coast on Monday, are also in their group.
The top two sides from each of the three groups, along with the two best third-placed teams, progress to the quarter-finals. At stake for the top six finishers is qualification for the 2027 World Cup in Brazil.