Kolinisau was relegated to the bench by Coach Alifereti Dere after he copped two yellow cards in the tournament.
And as you know that Kolinisau was not even picked for the NZ and USA leg when the coaches said that they wanted young players to be part of the team.
With 19 nil down at half time against Wales, Fiji came back firing in the second half with replacement player Osea Kolinisau scoring his first try after being set up by Emosi Mulevoro.
Kolinisau again displayed his sheer pace as he danced his way through two Welsh defenders before Samisoni Viriviri leveled the score after he touched down in the corner.
With two minutes remaining Kolinisau put the game beyond doubt with his third try.
Speaking after the tournament, Kolinisau said 7s legend, Waisale Serevi played a big part in their win.
Kolinisau also had a message for all the children in Fiji.
Coach Alifereti Dere who was in tears said the players seemed to have relaxed in the first half after their win over New Zealand.
Dere said the win is special for Fiji.
Sevens legend and newly IRB hall of fame inductee Waisale Serevi said he cannot ask for anything more.
Earlier in the quarterfinals Fiji outclassed Australia 29-5 and in the semifinals, the defending champions came from 14-nil down to thump series leaders New Zealand 33-14.
After the win in Hong Kong, the Fiji 7s team moves up to second spot on the IRB 7s series standing.
Fiji now has 88 points while New Zealand is still leading with 113 points.
Samoa is in third place with 84 points and South Africa is fourth with 78 points.
Meanwhile, France beat Argentina 19-14 to win the Shield, England thrashed Hong Kong 42-7 in the Bowl final, Samoa claimed the plate after beating Canada 12-7 while New Zealand finished third after thrashing Kenya 36-5 in the third place playoff.
The sevens series now moves to Japan this weekend where Fiji is pooled with Portugal, South Africa and Spain.
Fiji plays South Africa in the first pool match at 1.44pm Saturday.
Story by: Akuila Cama & Vijay Narayan
