Longboard Championship (WLC) concluded at Jinzun Harbour in Taitung County, southeastern Taiwan.
"This doesn't feel real at the moment, I'm totally tripping out on this," Jensen was quoted as saying in press release issued by the World Surf League (WSL), the chief organizer of the 8-day event.
Jensen was previously eliminated in the quarterfinals of the Taiwan Open WLC event earlier in the week.
But when Delpero of France beat Brazilian Phil Rajzman in the final of the Taiwan Open earlier Sunday, he joined Jensen at the top of the rankings, meaning that the event needed to run one more round to decide the 2017 World Longboard Champion.
It is only the second time in WSL history that a World Championship has been decided by a surf-off -- when both surfers finish the season in equal first place in the rankings.
"It has been an absolute roller coaster of a week with losing in the quarterfinals, then watching everyone fall out, then realizing I still had a chance was mind-blowing. For it to go down to a surf-off is really cool," Jensen said.
The American has previously won world championships in 2011 and 2012 in Italy and in China, respectively.
Although he lost to Jensen in the surf-off, Frenchman Delpero won the Taiwan Open championship, his first WLC title, as well as US$15,000 in prize money.
Source: Focus Taiwan News Channel