Oluwatosin Demehin Blessing made her debut World Cup appearance at the 2023 FIFA Women’s World Cup, jointly hosted by Australia and New Zealand. She played with distinction at the Super Falcons defence throughout the four matches until they were eliminated by the Lionesses of England on penalties.
Demehin was one of the three youngsters—19-year-old Deborah Abiodun, Rofiat Imuran (19), and Oluwatosin Demehin (21) chosen from the Falconet team by coach Randy Waldrum.