The Estoril Open is an ATP clay court tennis tournament that is held every year in the Portuguese Riviera. This tournament was created after the historic Portugal Open was cancelled due to the lack of sponsorships in 2015. The duo of former Dutch tennis player Benno van Veggel and Portuguese football agent Jorge Mendes helped in the creation of this tournament. This tournament is also known as the Millennium Estoril Open for sponsorship purposes.
Since the inaugural edition of this tournament, the matches are played on the clay court surface of the Clube de Ténis do Estoril that is located in Cascais, Portugal.
In the singles category, a total of 28 players will participate out of which 19 will be with direct input according to the ATP classification, 2 from "special exempts ", four players from the qualifiers while three will be the "wild -cards.” On the other hand, the doubles draw will contain 16 pairs of players in which 14 will be with direct input according to the ATP classification and two as the "wild-card" entrants.
|Qualified 2nd Round||6||€ 2,285|
|Qualified First Round||-||€1,145|
|Qualified 2nd Round||-||-|
|Qualified First Round||-||-|
In 2018, Portuguese player Joao Sousa defeated the American player Frances Tiafoe by a score of 6-4, 6-4 in the finals to grab the title in the men's singles category while in the doubles category, it was the British pair of Kyle Edmund and Cameron Norrie who defeated Wesley Koolhof (Netherlands) and Artem Sitak (New Zealand) by 6-4, 6-2 in the finals.