Tonga beat England 30-12 in Perth in the Rugby League World Cup opener.
It was Tonga's first win over England in history after six straight losses.
Tonga led 10-0 at the break and held England scoreless for 40 minutes.
Stefano Utoikamanu scored the first try after a pass from Isaiya Katoa.
Katoa kicked three goals and four penalties for 14 points with the boot.
AJ Brimson scored in the 46th minute to cut the lead to 10-6.
Olakau'atu and Koula scored in quick succession to break England.
Dom Young scored to make it 24-12 and set up a tense finish.
Olakau'atu scored his second try from a Katoa kick to end the contest.
A big crowd at HBF Park backed Tonga all night long.
England must beat France and Papua New Guinea to reach the semi-finals.
Tonga play Samoa on November 1 in a sold-out game at CommBank Stadium.
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