[7][8][9] He appeared in only four games in his first year, starting with a 2–1 home victory over Rio Ave on 29 November;[10] on 24 April 2010 he scored a first goal in a 5–2 away defeat of Vitória de Setúbal.

[11] After Bruno Alves left for Zenit, Maicon became a first-team regular in 2010–11, playing 37 competitive matches as Porto won the treble (including eight in the victorious run in the UEFA Europa League).

[13] He scored five goals from 35 appearances over two seasons, helping his team to back-to-back national championships; in October he was awarded the Dragão de Ouro as the club's Player of the Year.

[14] Maicon made his only appearance for the reserves in Segunda Liga on 3 February 2013, and scored a free kick from his own half in the 3–1 home victory against Oliveirense.

[16] On 14 February 2016, having been deemed surplus to requirements by new manager José Peseiro, Maicon was loaned to São Paulo;[17] upon arriving, he stated that the move was "a dream come true".

[20] Maicon signed a permanent deal for R$22 million on 28 June 2016, as Porto also ceded 50% of the sporting rights to fellow defenders Inácio and Lucão.

[22] He scored a career-best five goals – all in the first half of the campaign – as the team from Istanbul won the Süper Lig in his first season, including two on 30 September in a 3–2 home win against Kardemir Karabükspor.