[2] At the leg of the 2019 FINA Artistic Swimming World Series held at the Palace of Water Sports in mid-April in Kazan, Russia, Díaz del Río won a bronze medal in the mixed duet technical routine with a score of 74.3859 points on 19 April.

[5] Approximately three months later, at the leg of the World Series held in a virtual format and hosted by Canada, he and his partner achieved a score of 80.7076 points in the mixed duet technical routine, however were again ineligible for a medal as they were outscored by another team from Spain.

[6] For the first leg of the 2022 FINA Artistic Swimming World Series, conducted in virtual format by the United States and Canada in March, Díaz del Río performed his choreography in the solo technical routine to music by English musical artist Labrinth, earning 76.4571 points and winning the silver medal.

[23][24] Later in the day, he and his partner Emma García achieved a score of 188.7458 points in the mixed duet technical routine, however they were ineligible for a medal as they were not the highest-ranking duo in the event from Spain.

[25] The third and final day, he and Mireia Hernandez Luna ranked third in the mixed duet free routine with a 194.5083, however the bronze medal went to the duo from Belgium as they were not the highest-scoring Spaniards.