Bayern Munich manager Pep Guardiola blamed last week's international friendlies for the European champion's below-par performance in Saturday's labored 1-0 win at Eintracht Frankfurt.

A superb volley from Croatia striker Mario Mandzukic was the highlight of an otherwise off-key performance as Bayern failed to dominate Frankfurt despite enjoying 70 percent possession.

Guardiola pointed to the fact he had 15 of his 26-man squad away on international duty last Wednesday with their respective nations, allowing him only limited time to prepare for the trip to Eintracht.