[8] He was included in UEFA's Europa League Breakthrough Team for 2018: the citation described him as having a "towering presence in the Olympiacos back line, allied to deceptive pace and a great awareness [and] also a threat from set pieces.

"[9] On 12 February 2020, Cissé scored a quick-fire double to quash Lamia's stubborn challenge and secure Olympiacos' qualification to the Greek Cup semi-finals, in a thrilling 3–2 home win game.

[10] Later that month, on 27 February, he scored with a stooping header from a corner-kick, when French international Mathieu Valbuena curling over a dangerous delivery into the heart of the Arsenal's penalty area in a glorious 2–1 away win in London for the Europa League round of 32, 2nd leg.

[13] On 19 August 2021, Cissé scored a goal against Slovan Bratislava, sealing a 3–0 home win in the Europa League playoffs, 1st leg.

[20] Cissé's performances in the 2021 Africa Cup of Nations, after replacing Napoli star Kalidou Koulibaly who had tested positive for coronavirus, in the Lions of Teranga's first two Afcon matches against Zimbabwe and Guinea attracted the interest of many European clubs.