Barcelona lost their opening Champions League match for the first time in 23 seasons as a Thomas Muller strike and Robert Lewandowski's brace earned Bayern Munich a 3-0 win on Tuesday.

The hosts were seeking revenge following their 8-2 loss against the same opponents in the 2019-20 quarter-finals, but Bayern proved far too strong once again in the Group E opener between the two heavyweights.

Muller opened the scoring in that humbling defeat for Barca 13 months ago and did likewise in the first half at Camp Nou before Lewandowski's simple finish gave Bayern breathing space early in the second period.

Lewandowski doubled his tally late on to seal a routine win that moves the German champions into top spot after the first round of fixtures, while Barca sit bottom after Dynamo Kyiv and Benfica played out a goalless draw.