With City defending a comfortable 4-0 lead at the Etihad Stadium, Pep Guardiola has taken the opportunity to rotate his ranks in the second leg.
And one of the new faces given the chance to shine is Foden who, at 17, makes his eighth appearance of the season.
Foden in turn becomes the youngest Englishman ever to start a Champions League knockout game, taking the record from a player formerly of City's biggest rivals.
Kieran Richardson had previously set the mark when he played for Manchester United in March 2003 at 18, curiously enough also against Basel.
Overall, meanwhile, the England youth international enters the list in sixth place.
17y 283d - Phil Foden will be the youngest English player to ever play in a Champions League knockout match, as well as the youngest to play in a Champions League knockout game for an English club. Future. pic.twitter.com/mrvb3ZneRf— OptaJoe (@OptaJoe) 7 de marzo de 2018
Julian Draxler and David Alaba also make the top five, as do the rather lesser known Martin Klein and Kai Havertz, who played for Sparta Prague and Bayer Leverkusen respectively.