Akane Yamaguchi
Marín started the 2020 season at the Southeast Asian tour on a positive note; reaching the semi-finals of Malaysia Masters where she lost to Chen Yufei. A week later, she then reached the final of the Indonesia Masters, where she narrowly missed the title after getting defeated from Ratchanok Intanon in three games 19–21, 21–11, 18–21. She continued her good form and thereafter reached the semi-finals of Thailand Masters, which she lost to top seed Akane Yamaguchi in a close rubber game. In February, she reached the final of her home event Barcelona Spain Masters, where she lost in an upset to rising Thai star Pornpawee Chochuwong in the rubber games 21–11, 16–21, 18–21. In March, she competed as 8th seeds in the All England Open, but stopped by the eventual champion Tai Tzu-ying in the semi-finals.