"When I didn’t make the Rio Games I needed to change something, so today I feel very happy and excited," said Corbera, who clocked 49.65sec, with Georgia’s Mariami Kerdikashvili second fastest on 50.01 in this International Canoe Federation competition.

A total of 10 Olympic quota places were on offer in the qualifier.

Corbera’s was the first of the morning’s four finals.

Spain’s Isabel Contreras secured the crucial victory in the K1 women’s 500m.

Denmark’s former world champion Rene Holten Poulsen, seeking a fourth Olympic appearance, was disappointed in the K1 men’s 1000m final as he could only finish fourth, 4.33sec behind the winner, Artuur Peters of Belgium.

Ukraine’s Pavlo Altukhov earned the C1 men’s 1000m place in a time of 4min 03.00.

Britain’s Deborah Kerr won the K1 women’s 200 metres final, the first of the concluding six qualifier finals in 42.23sec from Italy’s Francesca Genzo on 43.11 and Natalia Podolskaia on 43.29.

The K1 men’s 200m place went to Russia’s Evgenii Lukantsov in 35.82.

The C2 men’s 1000m final was won by Spain’s Cayetano Garcia and Pablo Martinez in 3min 46.19sec from Hungary’s Balazs Adolf and Daniel Fejes, with third place going to Portugal’s Bruno Afonso and Marco Apura.

The K2 men’s 1000m final went to Hungary’s Kornel Beke and Adam Varga in 3:21.96 ahead of Poland, who clocked 3:22.50, and Norway, who recorded 3:24.71.

Victory in the C2 women’s 500m final went to Moldova’s Daniela Cociu and Maria Olarasu who recorded 2:04.93, with second place going to Russia in 2:05.88 and third place to France in 2:07.00.

The K2 women’s 500m final was won by the German pair of Sarah Bruessler and Melanie Gebhardt in 1:48.94 ahead of Russia in 1:49.26 and Spain in 1:50.30.

Three days of ICF World Cup racing is scheduled for the next three days.