Hooker Gordon Chan Kum Tong scored two tries in Manly's big Harold Matthews win.

Manly Warringah Sea Eagles recorded two victories over Central Coast Roosters in round four of the NSWRL Junior Representative competitions at Lottoland on Saturday.

The Sea Eagles beat the Roosters 40-0 in the Harold Matthews competition and won 36-28.

Harold Matthews

The Sea Eagles scored eight tries with full-back Tolutau Koula and hooker Gordon Chan Kum Tong (pictured) both scoring two tries each in the big win.

Manly led 20-0 at half-time through the double to Koula and a try each to winger Atelea Afeaki and centre Tony Francis.

Sea Eagles captain and second-rower Sam Pinomi, Lachlan Gorman, and Tong crossed for tries in the second half with Francis kicking four goals.

Under Coach Trevor Ott, Manly have won three of their four matches. It was the second time Manly have kept a team scoreless after the Sea Eagles also shutout Norths in the opening round.

SG Ball Cup

Two tries each to centre Dane Oostendorp and five-eighth Joshua Schuster helped Manly to their 36-28 victory.

The Sea Eagles scored four first half tries to lead 24-10 at half-time before holding off a second half comeback by the Roosters to take the two competition points.

Winger Roland Podesta and hooker Tyran Ott also crossed for tries in the win. Podesta had a fine day with the boot, kicking six goals from six attempts.

Manly have won two of their first four games under Coach Brett Fulton.

Round 5 fixtures

Illawarra v Manly

Collegians Sporting Complex, Saturday, March 10

Harold Matthews 12pm, SG Ball 1.30pm