A New Era Of Portuguese Tennis In 2017, Portugal returned to the ATP Challenger Tour for the first time in five years, with the European nation's capital of Lisbon hosting a clay-court event. Now, the country has welcomed a second tournament, with the inaugural Braga Open making a splash in 2018. The two-week swing immediately follows the Millennium Estoril Open, an ATP World Tour 250 event, creating a month of world-class tennis in Portugal.