Internazionale left Bayern Munich coach Jurgen Klinsmann lots to ponder after winning the Franz Beckenbauer Trophy with a 1-0 win at the Allianz Arena on Tuesday evening.
A goal from Mancini in the 52nd minute was enough to decide the game for Jose Mourinho's side.
It is the second year running that Bayern have lost their last major friendly at home 1-0, having gone down to Barcelona a year ago.
Their competitive season begins on Sunday with a visit to third division club Erfurt in the first round of the DFB-Pokal.
Inter are not in serious action until the end of the month, when they start their Serie A campaign at Sampdoria.
But with almost four weeks still to go to that game, Mourinho already appears to have his team in good shape, and they tested Michael Rensing on several occasions.
The goal came in the 52nd minute when Mancini broke the offside trap before lifting an angled shot over Rensing. He needed some help though, and the ball struck the underside of the bar, the post and the leg of Bayern defender Daniel van Buyton on its way into the net.
Bayern tested Inter's veteran stopper Francesco Toldo in the second half but could not find a way through.
There was also cause for concern after Martin Demichelis was brought off in the first half with a slight muscle injury, although it is thought the substitution was made as a precaution.
It is the second year running that Bayern have lost their last major friendly at home 1-0, having gone down to Barcelona a year ago.
Their competitive season begins on Sunday with a visit to third division club Erfurt in the first round of the DFB-Pokal.
Inter are not in serious action until the end of the month, when they start their Serie A campaign at Sampdoria.
But with almost four weeks still to go to that game, Mourinho already appears to have his team in good shape, and they tested Michael Rensing on several occasions.
The goal came in the 52nd minute when Mancini broke the offside trap before lifting an angled shot over Rensing. He needed some help though, and the ball struck the underside of the bar, the post and the leg of Bayern defender Daniel van Buyton on its way into the net.
Bayern tested Inter's veteran stopper Francesco Toldo in the second half but could not find a way through.
There was also cause for concern after Martin Demichelis was brought off in the first half with a slight muscle injury, although it is thought the substitution was made as a precaution.
Copyright (c) Press Association
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