The first seeds were all scalped in the singles tournaments at the St Johns Club Wanganui Junior Tennis Open at the weekend.
Two of the favourites made their respective finals, but four of the five singles titles went to the second seeded player, with the other going to the third seed in a further upset.
In a strong 16-player Men's Open grade, Taranaki teenager Jayden Harrison had been favoured to win, but he lost the final to 22-year-old Wellington based South African Daniel Alves 6-3 7-6 (7-4).
The much smaller Women's Open, which was played as a round robin, was won by Elesha Smith, the second seed behind Lower Hutt's Sophie Painter.
One of the most exciting games of the weekend was the 10-and-under Boys final, which was a tournament that two girls were sanctioned to play in due to the low numbers of their own division.
Luca Pavkovic, the third seed, won a three-set tiebreak thriller against second seed Johnny Baird 2-4 4-2 10-8.