Though other clubs came close to hitting the mark, including Bayern Munichâs 19-match unbeaten run from 2019 to 2021, it is City who have finally claimed the record for themselves. Their last defeat in the Champions League came in the 2021â22 season at the hands of Real Madrid in the semi-finals, where a 3â1 loss at the Santiago Bernabeu ended their campaign. However, the penalty shootout defeat to Madrid last season does not count toward the unbeaten streak, as the match ended 1â1 after extra time.