The emphatic victory at Stadion Miejski ŁKS saw Nigeria finish second in Group F with four points, behind Spain, and book their place in the knockout stage after an opening defeat to Spain and a goalless draw against China.
• Nigeria: Ramotalahi Kareem 17' (pen), Rebecca Adegbemile 19', Janet Seimeyeha Akekoromowei 23', Ramotalahi Kareem 27', Winner Onajite David 60', Ramotalahi Kareem 64', Tosin Rafiu 70', Rebecca Adegbemile 74', Winner Onajite David 75', Winner Onajite David 90+4'
• New Caledonia: Joceline Kourevi 89'
Nigeria wasted little time asserting their dominance, with Ramotalahi Kareem opening the scoring from the penalty spot in the 17th minute.
Just two minutes later, Rebecca Adegbemile doubled the advantage before Janet Seimeyeha Akekoromowei made it 3-0 in the 23rd minute.
Kareem then struck again in the 27th minute to complete a dominant first-half display and send the Falconets into the interval with a commanding 4-0 lead.
Nigeria showed no signs of slowing down after the restart. Winner Onajite David scored in the 60th minute before Kareem completed her hat-trick four minutes later.
Tosin Rafiu added Nigeria’s seventh in the 70th minute, while Adegbemile scored her second four minutes later.
David then struck again in the 75th minute before completing her own hat-trick deep into stoppage time.
New Caledonia managed a consolation goal through Joceline Kourevi in the 89th minute, but David restored Nigeria’s nine-goal advantage in the fourth minute of added time to complete the remarkable 10-1 scoreline.
Record-breaking victory
The result represents Nigeria’s biggest-ever victory at the FIFA U-20 Women’s World Cup, underlining the Falconets' attacking strength after they had struggled to score in their first two group matches.
Kareem and David both finished with hat-tricks, while Adegbemile contributed two goals in an outstanding team performance.
The Falconets ended Group F with four points, level with China but ahead on goal difference. Spain topped the group with nine points, while New Caledonia finished without a point after conceding 25 goals across their three matches.
Nigeria's group-stage record was one win, one draw and one defeat, with the Falconets scoring 10 goals and conceding three.
The qualification also means Nigeria remain in the competition as the only African team to progress to the knockout stage.
After twice reaching the final of the U-20 Women's World Cup, the Falconets will now turn their attention to the Round of 16, where they will look to continue their push for a first-ever world title.