Its more about when it matters, when it comes to the crunch. For example in the last Euros when they lost to Italy. They bottled it, that's not very German is it.
Germans have been notorious bottlers since 1990. Pretty much since they became just Germany.
1990: WEST GERMANY, world cup winners.
1992: GERMANY, lose euros final to denmark
1994: GERMANY, lose quarters to bulgaria in quarters
1996: GERMANY, just about defeated czech after extra time at euros
1998: GERMANY, lose to croatia in quarter finals of world cup
2000: GERMANY, knocked out in groups after gaining 1 point.
2002: GERMANY, lose in the final to Brazil
2004: GERMANY, again knocked out in groups at Euros, couldnt even beat Latvia or Czechs
2006: GERMANY, hosts of the world cup, one of the favourites, lose in semis to Italy.
2008: GERMANY, get to the final where defeated by Spain
2010: GERMANY, one of the favs as tournament progressed, once again lose to Spain, this time in semis.
2012: GERMANY, one of the favs once again, this time bottle in semi against Italy.
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It's quite amazing that they keep getting so far in tournaments whether its semi finals or finals and then just losing or not living up to expectations. since they won at euro 96 they have progressed to the last 4 in 5 of the next 8 tournaments, failing to win anything.