Ghana made a false start to their FIFA U20 Women's World Cup campaign after conceding at the death to lose 1-0 to New Zealand on Monday.
Substitute Tayla Christensen Tayla rounded up goalkeeper Victoria Agyei before slotting into a gaping net in the 89th minute.
The Black Princesses paid for their profligacy after squandering several chances in both halves.
By half-time New Zealand goalkeeper Olla had made half a dozen saves.
The best chance of the opening half saw Jane Ayieyam volley a cross over the crossbar from close-range, narrowly failing to convert what would have been a spectacular goal.
Ghana kept knocking at the door but their efficiency in the attacking third was poor.
The clearest opening of the match saw Wasila Diwura-Soale latch onto a midfield turnover and run clear, but Olla came out to make a brave diving block at the feet.
New Zealand forward Jasmine Pereira fired a volley inches wide late on, but the Junior Football Ferns finally broke the deadlock a minute from time.
Substitute Christensen pushed her way through a static back four and rounded the keeper to score a much-celebrated winner.