Competing in the 12s age-group, Lucia - a Cashmere Tennis Club member and Rolleston Primary School pupil - and her Auckland-based partner, Jamie MacKenzie, took out the mixed doubles in convincing fashion at the Scabro Tennis Centre.
The top-seeded duo only dropped two games in their three matches and won the final 4-0, 4-0 in 37min against No 2 seeds Max Richardson and Chelsea Wijntjes, of Auckland.
She also made it into the semi-finals of the singles, where she lost to Samoa's Mahinarangi Warren 4-6,-3-6. But she bounced back to win the play-off for third beating Chelsea once again 6-3, 6-0.
Lucia then teamed up with club mate Ruby McPhail in the doubles and lost a tough semi-final against Chelsea and her partner Xin Xin Zhu 6-3, 4-6, 7-10.
Lucia will now represent New Zealand at the Tennis Australia nationals in Melbourne, which start on December 10. It will be her fourth time representing her country overseas this year.
