The 21-year-old international from Belgium was signed by the treble-winners on Thursday, and Doku might make his Manchester City debut against Sheffield United on Sunday.
West Ham, Tottenham, and Chelsea, three Premier League teams, all shown late interest in the former Rennes right-winger, but Manchester City ultimately paid £55.4 million for him.
Doku, who will wear No. 11 at the Etihad Stadium, takes Riyad Mahrez’s place at Manchester City after the Algerian’s £30 million transfer to Al-Ahli of the Saudi Pro League.
The 21-year-old joins Mateo Kovacic and Josko Gvardiol, two more Croatian players who joined Pep Guardiola’s side this summer from Chelsea and RB Leipzig, respectively.
Doku was allegedly on a short list of three players who were being considered to take Mahrez’s place, along with Kingsley Coman of Bayern Munich and Michael Olise of Crystal Palace.
According to Fabrice Hawkins, Manchester City had been considering a bid for the 27-year-old attacker but Bayern Munich turned them down.
The Frenchman, who has represented Bayern Munich, Juventus, and PSG, has amassed 29 major championships, including eight Bundesliga titles.
When the Blues eventually acquired Jack Grealish from Aston Villa for a world-record £100 million, Coman was also mentioned as a potential transfer target for Manchester City in 2021.
In the midst of Bayern Munich’s interest in the Blues’ Stefan Ortega, Kyle Walker, Julian Alvarez, and Kalvin Phillips, the 27-year-old joins a growing list of players who have been linked between Manchester City and the German club during the summer transfer window.
Michael Olise, 21, signed a new deal at Selhurst Park despite Chelsea activating the forward’s £35 million release clause, despite Manchester City considering a bid for him this summer.
Manchester City, who recently added a new winger, is still searching for a midfielder. Eberechi Eze of Crystal Palace and Matheus Nunes of Wolves have both been mentioned.