England captain Kane had signed a four-year deal amid a media frenzy only hours earlier and made a substitute appearance in the second half but could not prevent a season-opening defeat against the German Cup winners.

Spaniard Olmo pounced on Bayern’s sloppy defending in the third minute to slot in for the lead and he added another with a superb flick and turn that left two defenders standing a minute before the break.

Leipzig’s Mohamed Simakan had almost gifted Bayern an equaliser a little earlier, hitting the post in his effort to clear the ball.

With Bayern wasteful up front, squandering half a dozen chances, coach Thomas Tuchel brought on Kane, whose transfer cost a reported Bundesliga record 100 million euros, in the 64th to huge cheers from Bayern fans.

He hardly got a look-in, however, with only three touches and it was Olmo who scored again, this time with a penalty only four minutes later, to secure the first title of the season for his team.

Bayern kickoff their Bundesliga season on Friday against Werder Bremen.