Czech Jakub Krejci, the second-last paddler on the Polish city's Kolna Regatta Course, finished the junior K1 final with a time of 85.42secs.

This was faster than the winning time in the under-23 K1 earlier in the day, with Krejci set to top the podium.

Delassus then took to the water, however, impressing with 85.15 and claiming the gold medal.

“It’s fantastic, I didn’t know the time of Jakub at the start, so I’m so happy,” Delassus said.

“I was not in good form at the start of this year and French team selection was bad for me.

"But I feel very well now, so I’m very happy.

“This is my last year as a junior. 

"Next year will be the same, just a little bit harder.”

Bronze went to Slovenia’s Vid Ostrbenk with a time of 89.61.

Delassus beat the under-23 K1 time of compatriot Pol Oulhen, who triumphed in 86.02.

Another Frenchman, Mathurin Madore, finished second in 86.32, with former junior world champion Mario Leitner of Austria third in 87.82.

Gabriela Satkova of Czech Republic successfully defended her title in the junior C1, finishing just 2.58 seconds ahead of team mate Tereza Kneblov in 107.73.

In third was Italy's Marta Bertoncelli on 109.93.

Brazil’s Ana Satila was the victor in the under-23 C1 final, recording a time of 101.06

Silver went to Russian Alsu Minazova, whose initial time of 100.45 was marred by four seconds of penalties.

Monika Skachova of Slovakia finished in bronze medal position with 105.95.

The World Championships conclude tomorrow with the extreme slalom finals.