Nozomi Okuhara
In September, after an eight-month break forced by the injury, Marín returned to competition at the 2019 Vietnam Open but suffered an opening round defeat to Supanida Katethong. However, she was able to bounce back and, on 22 September, she won the China Open, defeating Tai Tzu-ying in the finals with a score of 14–21, 21–17, 21–18. This was Marín's first title of the season, which she followed with the semi-finals at the Denmark Open, where she was defeated in three tight games by Nozomi Okuhara. She reached the final of the French Open next week, where she was defeated by Korean youngster An Se-young in three games 21–16, 18–21, 5–21. Her achievements in the last three tournaments succeeded in bringing her back into the world top 10 of BWF women's singles ranking. She further won Syed Modi and Italian International tournaments later in the year.