Cuba's Alba, who won bronze at Tokyo 2020, defeated Croatia's Ivan Šapina 2-1 in the men's over-80 kilograms class while South Korea's Lee, the runner-up at the Games in Japan, overcame home favourite Althéa Laurin by the same scoreline in the women's over-67kg category.

Alba took the first round and seemed destined to sweep to gold in the second, but Šapina landed a head kick to earn a final chance at victory.

Nevertheless, the Cuban held his nerve to secure his first Grand Prix title.

He had entered the competition as the fifth seed and battled through Norway's Milos Pilipovic, Morocco's Ayoub Bassel and Croatia's Paško Božić to reach the semi-finals.

Alba swept past Pilipovic and Bozic 2-0 while he was forced to go the distance versus Bassel.

Meeting him in the semi-finals was Ivory Coast's Cheick Sallah Cissé, the winner of the under-80kg event at Rio 2016.

The Cuban gained the upper hand after edging the first round and there was a momentary scare for Cissé in the second when he went down with what looked like a shin injury, but the eighth seed carried on with his sights set on reaching the final.

However, it was never meant to be for Cissé as he sustained five gam-jeom penalties, meaning he automatically lost the round and therefore the match.

Spain's seventh seed Ivan Garcia Martinez claimed the other bronze after losing 2-1 to Šapina.

Earlier in the day, back-to-back Grand Prix winner Emre Kutalmış Ateşli lost in the round of 16 to China's eighteenth seed Song Zhaoxiang in consecutive rounds.

Ícaro Miguel Martins Soares of Brazil, who entered as the first seed and as a world silver medallist, was also shocked in the second phase of the competition, losing 2-0 to Britain's Caden Cunningham.

In the women's over-80 division, Lee prevented Laurin, an Olympic bronze medallist herself, from receiving a home coronation following a dramatic three-round contest and to follow up her win in Rome.

The South Korean edged the first round before Laurin bounced back in the second.

Then, with the match on the line, Lee performed a perfect spinning back kick to create a 10-point gap with 35 seconds left on the clock.

The home favourite went on the offensive thereafter, but the damage was already done and Lee walked away with gold.

In the first semi-final bout, Brazil's Gabriele Siqueira lost 2-1 to Laurin to settle for bronze.

The other bronze medal went to Turkey's Mediterranean Games champion Nafia Kuş, who finished with the same result against Lee.

One of the shocks of the earlier rounds involved two-time Olympic bronze medallist and first seed Bianca Walkden of Britain falling to a 2-1 defeat to Siqueira.

The final day of the Grand Prix coincided with Taekwondo Day and World Taekwondo President Chungwon Choue addressed the audience to mark the occasion.

"Today's a special day as we are celebrating Taekwondo Day around the world," he said.

"As you know, we have 212 member nations plus one.

"I am saying plus one as we are taking care of refugee children around the world.

"We are really happy to be here and, of course, we will be back next year.

"And two years from now we will have an Olympic and Paralympic Games in Paris.

"We are going to deliver one of the best Olympic Taekwondo competition to the world."