Borussia Dortmund's emergence as a force to be reckoned with in European football is truly astonishing, considering the budget and competition Jurgen Klopp is up against.
They have become the new challengers to Bayern Munich as the kingpins of German football and Europe as a whole, and the fact they have done all this with less resources than rivals is admirable.
Their success stems from an increased degree of economic shrewdness present in a club that cannot rely on a huge transfer budget for success. Borussia Dortmund cannot sign proven world class stars, they must develop their own stars, by signing lesser known players at affordable prices, or by bringing quality youngsters into the first team.
Think of Shinji Kagawa, Mario Gotze, Marco Reus and Ilkay Gundogan, all of these players became household names playing for 'Die Schwarzgelben' (The Black and Yellows).
The frustrating thing about the success found under Jurgen Klopp's side, is that it becomes increasingly hard to maintain due to the vulture like approach adopted by Europe's richest sides.
Whenever a new team makes headway in the Champions League, their best players are poached by the established sides. The same happened to Lyon a few years ago, and history is now repeating itself with Dortmund.
It is so tough to break into the elite of European football, without a huge chequebook like the one Paris Saint-Germain are using so frequently since their takeover.
Up and coming sides must constantly rebuild, as their best players are headhunted by sides who partake in a, "if you can't beat them, buy them" philosophy. Unfortunately, their are no rules to prevent clubs doing this, as the transfer window is not a marketplace governed by moral guidelines.
Dortmund have managed to successfully rebuild after the loss of Shinji Kagawa and Nuri Sahin. And it will now be interesting to see if Jurgen Klopp can cope with the loss of attacking star Mario Gotze to main rivals Munich.
This rebuilding process will be made all the more difficult if another part of his forward line is poached, as the prolific Polish frontman Robert Lewandowski is linked with a move away from the Westfalenstadion.
They have shown real transfer savvy with the signings of Henrikh Mkhitaryan and Pierre-Emerick Aubameyang. Both appear to be quality players, but without the inflated price tags.
Klopp cannot afford to go around buying out the transfer clauses of Edinson Cavani or Luis Suarez, so he must conduct his transfer business in a more shrewd manner.
Dortmund really do deserve their place among Europe's elite, seeing as they have attained that position through developing their own stars, and not poaching such stars from their rivals.
It seems that Jurgen Klopp's men face a huge season ahead of them, trying to replicate the form of last season with a similar squad, competing against rivals who are strengthening theirs.
Dortmund will always struggle to compete consistently for trophies. Whenever they achieve success, their chances of repeating it are depleted, as their best players move to clubs with bigger payrolls, and larger squads.
It truly is a shame, that the main reason behind Dortmund's problem of maintaining success and keeping their best players, is that they are not competing on a level playing field with their rivals financially.
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