Eder Militao's return to Carlo Ancelotti's squad after recovering from an ACL injury leaves only Thibaut Courtois and David Alaba in the Real Madrid infirmary due to knee issues. Meanwhile, Dani Ceballos has rejoined group training after a stint of individual sessions last week.

Militao recently made a brief appearance as a substitute against Athletic towards the end of March, but Ancelotti might wait before reintroducing him to the starting lineup. Vinicius Junior, Militao's fellow Brazilian, is back from suspension, likely pushing Brahim Diaz to the bench against his former club, Manchester City.

Manchester City has faced defensive setbacks, with Josko Gvardiol nursing a minor injury from their recent Premier League match against Crystal Palace. However, Gvardiol is in the squad for the first leg. Unfortunately, Kyle Walker's hamstring injury rules him out, adding to Nathan Ake's absence due to a calf injury.

In Gvardiol's potential absence, Manuel Akanji showcased his versatility at left-back in the last game, giving Guardiola confidence in his inclusion from the start. Ederson, Bernardo Silva, and Phil Foden, all recovered from their respective issues, are expected to return to the starting lineup on Tuesday.

Potential starting lineups:

Real Madrid: Lunin; Carvajal, Rudiger, Nacho, Mendy; Valverde, Tchouameni, Kroos; Bellingham; Vinicius Jr, Rodrygo

Manchester City: Ederson; Lewis, Stones, Dias, Akanji; Silva, Rodri, De Bruyne; Doku, Haaland, Foden