Steffen had a relatively quiet night as City raced to a three-goal advantage by halftime, conceding a goal in stoppage time to Callum Hudson-Odoi.
However, No. 1 choice goalkeeper Ederson also posted on social media that he was self-isolating.
🚨 TEAM NEWS! 🚨— Manchester City (@ManCity) January 3, 2021
XI | Steffen, Cancelo, Dias, Stones, Zinchenko, Rodrigo, Gundogan, De Bruyne (C), Foden, Bernardo, Sterling.
SUBS | Carson, Aguero, Mendy, Fernandinho, Mahrez, Delap, Harwood-Bellis, Mbete.
🔷 #ManCity | https://t.co/axa0klD5re pic.twitter.com/6PyFzdfCjl
He had also made three Carabao Cup appearances since the start of the season, most recently in the 4-1 win over Arsenal.