In the 2009–10 season, Hulk established as an automatic first-choice. However, following a tunnel brawl during the league loss against S.L. Benfica (1–0) on 20 December 2009, he received a four-month ban (if the disciplinary hearing upheld the ban, he faced up to three years on the sidelines), only for the domestic competitions, as did his teammate Cristian Săpunaru. The ban was later reduced to four matches, and the player returned to league action on 28 March 2010 after missing 3 months and 18 matches, scoring in a 3–0 win at Belenenses. One week later, he also scored in a 4–1 home victory over C.S. Marítimo. With six less matches played than the previous season, he ended with five league goals.