[2] Lyanco's paternal grandfather, Jovan Vojnović, was an ethnic Serb born in the part of the Kingdom of Yugoslavia that is now in present-day Serbia and moved to Brazil at the age of seven, during World War II.

[6] On 29 March 2017, it was announced that Lyanco had signed a five-year contract with Serie A club Torino, for a reported fee of €6 million plus bonuses.

[4][7][8] He immediately moved to Turin to begin training with the team, and facilitate his acclimatisation to the club, at the orders of Siniša Mihajlović.

[12] On 30 October 2021, Lyanco made his first Premier League appearance, replacing Oriol Romeu in Southampton's 1–0 win against Watford at Vicarage Road.

[13] He was forced off with a hamstring injury in the first half of Southampton's FA Cup match against Coventry City on 5 February 2022, and was expected to be sidelined for up to 12 weeks.