NASINU Secondary School under-19 side has booked its spot in the Vodafone Fiji Secondary Schools Rugby League quarter-finals.
The secondary school rugby league giants finished on top of Pool A after preliminary rounds of competition in the Southern Zone Secondary Schools Rugby League.
Assemblies of God High School finished runners-up.
Pool B, which has Marist Brothers High School and Suva Grammar, is yet to be finalised.
Southern Zone Secondary Schools Rugby League secretary Taniela Vakamoce said three teams would represent the zone in the national finals.
"The winners of each pool have qualified for the national finals and will play in the playoffs to determine the champion of the Southern zone next week," he said.
"The runners-up from two pools will also play each other to determine the third team that will represent the zone in the national finals."
In Saturday's U19 games played at Bidesi Park, Lomaivuna defeated Suva Grammar 18-10 while MBHS retained the Pool B Tanoa Challenge title after overcoming Lomary 18-8.
Nasinu also retained the challenge title for Pool A after beating Laucala Bay Secondary School 18-2.
"We witnessed tough matches today (Saturday) and the competition level is expected to improve as we get into the knockout stages."