The Oeiras Jamor Ladies Open is a tournament for professional female tennis players played on outdoor clay courts. It is a WTA 125 event as it was upgraded from an ITF W100 event in 2024, having grown its status every year since its introduction in 2021. The first edition was a $60,000 ITF Women's World Tennis Tour event, the second edition in 2022 was a $80,000 event and the third in 2023 was a $100,000 event.