Almalki, the younger brother of 2016 Grand Winner Emad Almalki, completed two waza-ari and one yuko to beat Russia’s Radmir Nasyrov in the men’s cadet kumite under-57 kilograms final at the Sports Hall Santiago Martin.

"It is a feeling that I cannot describe," he said.

"I am so proud to represent Saudi Arabia in this tournament and it is a source of pride to be able to succeed here.

"I would like to dedicate this medal to my family, my friends and my country."

Phillipe, meanwhile, confirmed her status of one of the world's most promising karatekas with victory in women’s under-21 kumite under-61kg category.

The 19-year-old defeated Ukraine’s Ielyzaveta Sirosh by "senshu" to secure her second consecutive world title and fifth gold medal in 10 international appearances.

"It is a wonderful feeling," Phillipe, also the reigning European champion, said.

"It was a difficult tournament for me because I had to change categories, but I worked hard and I am super happy to be world champion again.

"I am thrilled for this second title.

"It was a lot of sacrifices and I want to dedicate this to my family who could not be here with me."

The strongest-performing nation on day four of competition was Japan as they claimed three gold medals.

Kenta Sakai became the country's fifth champion overall after overcoming Egypt’s Mohamed Salah Mohamed with four yukos in the final of men’s cadet kumite under-52kg division.

Shota Uchino also took the Japanese flag to the top of the podium with his victory by "senshu" over Denmark’s Lasse Boegelund in the men's cadet kumite under-63kg final. 

The third gold medal for Japan was achieved by Sakura Sawashima, who beat Norway’s Nora Benedicte Handelsby 2-0 in the women’s cadet kumite over-54kg final.

One of the highlights of the day was Spaniard Nadia Gomez's impressive journey to success in the women’s under-21 kumite under-50kg category.

The home favourite received two early yukos in the final against Iran’s Sara Bahmanyar Estalkhbejari, but she connected with two sensational ippon by mawashi-geri kicks to end up winning the bout 7-3.

There was disappointment, however, for Gomez’s compatriot Marina Caceres as she lost the women’s under-21 kumite under-55kg final against Iran’s Avishan Bagheri.

Bagheri took two yukos and one late ippon to claim the gold medal.

Thailand’s Aika Okazaki prevailed over Switzerland’s Amelie Voegelin in the women’s cadet kumite under-47kg final, while Serbia’s Ivana Perovic registered a surprise 4-0 win over Bulgaria’s Ivana Kamenova in the women’s cadet kumite under-54kg final. 

Montenegro’s Bojan Boskovic claimed the first gold for his country in the tournament with his triumph by split decision over Brazil’s Andre Dos Santos in the men’s cadet kumite under-70kg final.

Denmark’s Frederik Petersen Godthjaelp also opened his country’s gold medal tally with a convincing triumph over Chile’s Benjamin Nunez in the men’s cadet kumite over-70kg final.

Godthjaelp amassed two yuko and one impressive ippon by mawashi-geri to claim victory