Suva Grammar School will meet Ra High School in the Vodafone Super Deans semifinal next week after beating Ba Provincial Free Bird Institute 23-7 this evening.
The boys from Nasese ran in four tries, while Alfred Cornish scored Ba Pro's lone try.
The Grammar forwards dominated the collision area before spreading the ball wide.
They led 20-0 at halftime.
Ba Pro was eventually able to score in the second half taking advantage of the one man advantage as the Grammer centre was still in the sin bin through their flanker who broke two tackles before sprinting over 30 metres to score under the sticks.
With the last quarterfinal now being played, the semifinal fixtures are now confirmed with Nasinu Secondary School to play Lelean Memorial School next week.
In the games earlier today at Garvey Park, Tavua, Ra High caused an upset when they edged defending champions Ratu Kadavulevu School 12-10, while Nasinu defeated Cuvu High School 28-26.
At the HFC Bank Stadium, Lelean thumped Ratu Navula 26-5 in the first quarterfinal.