After an early first-round loss to Blaž Kavčič at the 2013 Australian Open, Bellucci got to the quarterfinals in doubles, with partner Benoît Paire, losing to Marcel Granollers and Marc López. In Jacksonville, playing for Brazil in Davis Cup competition, he upset John Isner in a five-set match, but Brazil lost the tie to the US 3–2. He won in the 1R against fellow countryman Guilherme Clezar but fell again to Volandri in the 2R at Brasil Open. After losing to Volandri the Brazilian had to hear boos from his own country crowd. After losing in the 1R in the next four tournaments (Buenos Aires, Acapulco, Indian Wells and Dallas) Bellucci finally came up with two wins in a row in Miami, over Daniel Brands and Jerzy Janowicz, then losing in the third round to Seppi. He started the European clay court season by losing again in the first round of Monte Carlo to Philipp Kohlschreiber and finally reached his first quarter-final of the year in Barcelona, by defeating Pablo Carreno Busta and Dmitry Tursunov; he withdrew from the tournament with an abdominal strain, which made him lose the rest of the European clay court season and the grass season, including Roland Garros and Wimbledon.