[11] In the domestic cup final on 31 May 2015, against Braga, Cédric was sent off in the 14th minute after conceding a penalty with a foul on Djavan, but Sporting eventually won in a shoot-out.

[14][15] He made his debut on 30 July, playing the full 90 minutes in a 3–0 home win over Vitesse for the third qualifying round of the UEFA Europa League.

[16] Ten days later, he first appeared in the Premier League, assisting the opening goal for Graziano Pellè in a 2–2 draw away to Newcastle United before being substituted for Cuco Martina at half-time.

[17] Cédric scored his first goal for Southampton on 18 March 2018, in a 2–0 victory away to Wigan Athletic in the sixth round of the FA Cup, the first match under new manager Mark Hughes.

[21] On 24 June, it was announced that Cédric had sealed a permanent move to Arsenal on a long-term deal, as a free transfer upon the expiry of his contract.

[34] On 27 January 2025, after being without professional activity since March 2024, Cédric signed a contract for just three months, extended to one year, with the Brazilian club São Paulo FC.

[41] His first game in the tournament took place on 25 June, when he started alongside Southampton teammate José Fonte in the round-of-16 clash against Croatia (1–0 win after extra time).

[43] He scored his first goal for his country on 17 June 2017, netting in the 86th minute of an eventual 2–2 group stage draw to Mexico at the 2017 FIFA Confederations Cup at the Kazan Arena in Russia.

[49] Cédric was involved in the Amazon Original sports docuseries All or Nothing: Arsenal, which documented the club by spending time with the coaching staff and players behind the scenes both on and off the field throughout their 2021–22 season.