Fans watched from rooftops as the Drua made their first-ever appearance in the competition in Lautoka, Fiji's second-largest city, with more than 11,000 fans in attendance who were treated to a thriller that almost ended in a home victory.
The Chiefs led 21-7 at half-time, before withstanding a second-half Fijian comeback to hold on for a nail-biting 35-34 victory.
The Chiefs were made to sweat as a 22-point lead was whittled down to a solitary point over the final 10 minutes and the Drua, buoyed by the crowd, gave the Waikato side a fright.