The summer of 2014 is set to be a critical one in Borussia Dortmund's history. Robert Lewandowski's move to Bayern Munich and the possible departure of Ilkay Gundogan, per the Daily Mirror's David McDonnell, mean that BVB will have to splash cash in the transfer market if they are to retain their status as one of Europe's best and most exciting clubs.
Sporting director Michael Zorc underlined the importance of this summer in a recent interview with WAZ (h/t to Goal.com): "We need to change everything. We need to evolve again and again, the departure of one or the other offers the chance to do so."
Speaking to Sport-Bild (h/t to Goal.com), CEO Hans-Joachim Watzke pledged to invest substantially in the summer: "It's no secret: we will invest a lot of money in the transfer market in the summer."
However, he added: "The amount we're going to spend won't be revealed, though."
Dortmund can, theoretically, invest much more than last summer's €50 million: Although they may take in less revenue from player sales and Champions League performance, other aspects of revenue will increase. Since the end of last season, a new TV deal has lifted Bundesliga clubs' revenue by 52 percent.
BVB reported a 14.4 percent increase in revenue in the first quarter of 2013-14, relative to their turnover the previous year.
The club is without debt as of August, so there is less need for BVB to make profits as they have in recent years (last season's figure was €53.3 million). Thus, investment of €50 million or even €75 million may be possible for the Ruhr club.
Of course, there is more to transfers than just the money spent. BVB have gained a reputation for being masters of spending wisely and spotting undervalued gems.
They will need to bring in a mixture of rising talent and established players if they are to remain a top team. The good news is: Success is within reach. Click "Begin Slideshow" for a run-down of the signings that would not only make up for the loss of Lewandowski, but they could make BVB competitive in Germany and Europe once more.