Christian Eriksen:
Danish midfielder Christian Eriksen would also be an affordable option for Klopp. Currently playing for Dutch clubs Ajax, Eriksen would be a solid addition to the Dortmund side.
Eriksen incorporates fluidity and style to his superb technical skills in such a way that resembles the playing style of former Danish legend Michael Laudrup.
A neat passer of the ball, he also possesses the ability to slip in a few through balls to give the striker (in this case Lewandowski, if he does stay) clear cut chances to score.
The fact that he is only 21 will be an added bonus. But it could also drive up his price.
Reports suggest that Eriksen is in search of a new challenge this summer and the Bundesliga might just provide him with that.