Porto Open

The Eupago Porto Open is a professional tennis tournament played on outdoor hardcourts. It is currently part of the ATP Challenger and the WTA Challenger Tour, and the ITF Men's Circuit. It has been held annually at the Complexo Ténis Monte Aventino in Porto, Portugal, since 1999 for women and since 2007 for men. The 2025 ATP Challenger edition was downgraded to a Challenger 100.
Between 2001 and 2002, the tournament was classed as a Tier IV event on the Women's Tennis Association Tour. It was held for two years, and had a total prize fund of $140,000 in each year. The most notable player to win the singles was three-time French Open champion Arantxa Sánchez Vicario, who won the 2001 event.
The tournament was played on clay courts up until the 2019 edition, when it changed to hardcourts.