Teufaiva was badly damaged in February's Cyclone Gita, less than a year after the ground was reopened following a $US1.5 million dollar upgrade.
Prior to that, the stadium was out of commission for international events, with no test rugby played at the ground for eight years.
The CEO of the Ministry of Internal Affairs in Tonga, 'Onetoto 'Anisi, said work to upgrade the field has now been completed, thanks to assistance from the New Zealand government, and the focus has moved to widening the running track to meet IAAF standards.