Walker sustained the problem against Manchester United in the FA Cup final, but the 33-year-old is confident that he will be given the green light to line up from the off as Man City finally aim to end their European hoodoo and complete a famous treble of trophies.
A recognisable backline of Walker, Ruben Dias and Manuel Akanji should therefore protect Ederson - who will return for FA Cup final shot-stopper Stefan Ortega - although Nathan Ake is on standby if Walker is ultimately spared.
John Stones will inevitably continue in his inverted role alongside Rodri, while two-goal Real Madrid hero Bernardo Silva and Jack Grealish - who has created 35 chances for Man City in the 2022-23 Champions League, the most by an English player on record - start out wide.
Needing just one more goal to break the single-season Champions League record for an English club, Erling Braut Haaland could also become the first Norwegian to score in a Champions League final since Ole Gunnar Solskjaer for Manchester United in 1999, where the Red Devils coincidentally secured a famous treble.
Manchester City possible starting lineup: Ederson; Walker, Dias, Akanji; Stones, Rodri; Silva, Gundogan, De Bruyne, Grealish; HaalandNo Data Analysis info