If England do well at the upcoming Under-21 European Championships fans shouldn't get too carried away just yet.
Success of an under-21 side at the Euros doesn't necessarily mean that the senior squad will go on to do great things.
The Three Lions won the Under-21 European Championships in both 1982 and 1984, with Terry Fenwick, Steve McMahon, David Seaman, Mark Hateley, and Steve Hodge eventually making it to the senior England squad.
However, England failed to qualify for the 1984 senior European Championships and crashed out of the 1988 one without a point to their name.
Of course, England did do well in the World Cups that followed the two Under-21 Euro successes.
Sir Bobby Robson's side made it to the quarter-finals of Mexico '86 and the semi-finals of Italia '90, though the players who came from the under-21 side weren't necessarily the key players.
Some under-21 sides do go on to achieve great things, but not straight away.
Italy won the Under-21 European Championships on three consecutive occasions - 1992, 1994 and 1996.
The players of those sides were among those that went on to have great successes with the Azzurri.
In the 1994 side were the likes of Fabio Cannavaro and Filippo Inzaghi, while the 1996 team also included Gianluigi Buffon, Alessandro Nesta and Francesco Totti.
All of those players were in the Italian side who won the World Cup of 2006.
That was 10 years after their under-21 success though, so even if England were to win the upcoming Under-21 European Championships, it wouldn't necessarily mean that they could do well in the senior competition next year.
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Italy had won the Under-21 Euros two years before their World Cup success in 2004, but only Alberto Gilardino of that squad could really have considered himself a key player of the 2006 senior side.
The German squad who were victorious in 2009's under-21 competition contained the likes of Manuel Neuer, Jerome Boateng Sami Khedira, Mesut Ozil and Mats Hummels, who helped guide Germany to victory in the 2014 World Cup five years later.
There are, however, plenty of sides who win the Under 21 European Championships but didn't go on to senior success.
Yugoslavia and the Soviet Union won the 1978 and 1980 competitions respectively, but failed to turn that into senior success.
Spain won the 1986 Under-21 Euros but struggled in subsequent senior tournaments.
France won the Under-21 Euros in '88 but failed to qualify for Italia '90 and then crashed out of the senior Euro '92 championships at the group stages.
Spain won again in 1998, but none of that side went on to be part of the successful Spain team of recent years.
The last two under-21 tournaments in 2011 and 2013 were also won by Spain.
Those sides did contain players that we would now consider household names, such as David De Gea, Juan Mata, Isco and Bojan Krkic.
However, such has been the wealth of talent in the senior Spanish squad, these players have tended to be more on the fringes of the squad.