After being relegated to the challenger category this year, the Estoril Open will return to the main men's tennis circuit next year, according to the calendar published by the ATP (Association of Tennis Professionals).

In 2026, the ATP 250 category tournament will be played between July 20 and 26.

The Estoril Open joined the ATP circuit in 1990, having been held between that year and 2014 at the Jamor Sports Complex, in Oeiras. In 2015, it moved to the Estoril Tennis Club, with a different organisation.

This year, the event will take place between April 26 and May 4 and will be an ATP 175 challenger, the highest level of the second tier.