Based on her good Bank of the West Classic tournament performance, where she won three qualifying matches and one main draw match, on 21 July 2008, Larcher de Brito's WTA singles ranking rose 56 places from the previous week, from No. 226 to 170 in the world, her then best ranking ever. With that ranking she became the highest ranked female Portuguese player, ahead of then world No. 192 Neuza Silva. At the Roger's Cup, Larcher de Brito won two qualifying matches to make it into the main draw. She then went on to defeat world No. 97 Vania King in the first round and world No. 18 Flavia Pennetta in the second before losing to fourth seed Svetlana Kuznetsova. After such a great performance by the 15-year-old, she rose to No. 131 in the world, making her the highest ranked Portuguese tennis player of all time.