It did not come, but the Catalan giants were able to record a first Champions League clean sheet in 19 games.Elsewhere on Tuesday, Bayern ‌Munich and Paris St Germain underlined their Champions ⁠League title ⁠credentials with victories over Atletico Madrid and Villarreal respectively, while Manchester United came ⁠from two goals down to snatch a dramatic win over AS Roma.Bayern broke down a stubborn Atletico ⁠side in Madrid as second-half goals from Lennart Karl and Konrad Laimer secured victory, while PSG set a record as the fastest team to score four goals in ‌a Champions League match on their way to a 6-0 victory.At Old Trafford, Matheus Cunha struck twice in quick succession after the break as United overturned a two-goal deficit to beat Roma 3-2, the comeback following protests by home supporters.