They repaid him nine times over.
Wales have beaten Fiji in the last two World Cups, and another success would confirm a quarter-final place ahead of Sunday's final group game against Uruguay.
"That was one of our objectives and we haven't achieved that and we're disappointed", he said.
However, the threat of a Super Typhoon to Scotland's game against Japan on Sunday is believed to be real.
While it now seems virtually assured that Ireland's final pool game against Samoa will indeed take place in Fukuoka on Saturday everything else remains somewhat up in the air after Scotland banked their expected try-bonus victory over Russian Federation today.
Scotland's clash with Japan at Yokohama is in danger of disruption due to typhoon Hagibis, which is set to hit the Tokyo area on Saturday.
While England and France have already qualified from Pool C, Ireland, Scotland and Japan can all still qualify from Pool A.
Argentina secured the consolation of qualification for the 2023 World Cup as they wrapped up their 2019 campaign with a 47-17 win against the United States.
"We chanced our arm a little bit and backed our attacking play, and put them under pressure to see how they reacted, and for large parts of the game that worked very well for us".
The three first-half tries came in an eight-minute blitz from the 13th to 21st minutes and the result was obvious from then on.
Sanchez then set up the second as his short kick took a disgusting bounce to wrong-foot Mike Te'o and give Tuculet an unexpected second, followed soon after by his own second and the team's third.
Wales showed two changes in their line-up, with flanker James Davies and number eight Ross Moriarty both making their first starts of the tournament.
George Horne contributed a hat-trick of scores, with George Turner, Tommy Seymour, John Barclay and Stuart McInally also crossing the tryline. A bonus point win was tough.
Super Typhoon Hagibis is on course to affect England's Rugby World Cup meeting with France in Tokyo.
"We have to win our next two games to qualify", was Townsend's blunt assessment.
The injury to Biggar is of particular concern, with the key playmaker exiting in the second half following a sickening mid-air collision with teammate Liam Williams.
Flyhalf Hastings, son of former Scotland great Gavin, weaved in from a scrum close to the Russian Federation line in the 13th minute.
The Welsh flyhalf caught the Fijian backline out of position with a clever cross-field kick to the left for Adams, who crossed in the corner. Gavin Hastings' 227 points is second on the tournament's all-time list.
"Such plans, if required, will only be actioned if the safety of teams, fans, and workforce can be guaranteed", organisers said in a statement. Only wing Graham was retained.
The former fly-half rested a quintet of front-line players in Greig Laidlaw, Finn Russell, Stuart Hogg, Blade Thompson and Johnny Gray as he juggles his 31-man squad on a punishing four-day turnaround for the Japan game.