Mats Hummels will follow in the footsteps of Mario Gotze and Robert Lewandowski this summer by swapping Signal Iduna Park for the Allianz Arena.
However, before completing his move to Bayern Munich, Hummels must captain BVB for one last time against his future employers in the German Cup final on Saturday.
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The 27-year-old released a statement saying that leaving Dortmund for Bayern had been the hardest decision of his life.
But Lewandowski, who made the same move two summers ago, believes Hummels has decided to move for one understandable reason: to win more silverware.
Lewandowski: Hummels wants to win titles
"He is one of the best central defenders in the world,” the Polish striker told Goal. "He passes the ball upfield very well.
"If Mats and Jerome [Boateng] play together, it could have a very good impact on our attack. Both have brilliant vision, both can play long diagonal passes between the lines. Our attacking game as a team can improve.
"But both have qualities in defence as well, that's for sure. I am looking forward to playing with Mats. I've already played with Mats for four years. I think he just wants to win titles now."
Hummels has won his fair share of titles with Borussia Dortmund, including two Bundesliga titles and a German Cup, but all of that success came under Jurgen Klopp. The gap between German football’s big two has widened over the past couple of years and could extent even further next season.
Lewandowski aiming for German Cup success
Bayern aim to win every competition they compete in, but Lewandowski insists this season will have been a success if they add the DFB-Pokal to their Bundesliga title.
"Of course we were deeply disappointed [not to reach the Champions League final] but that's football," he added. "Such things can happen but you move on after that.
"We are very happy now that we are German champions again. It's big news to win that title four times in a row. Now we have one final left, which is very important for us. If we win the cup, it will have been a really good season.
"We don't have to win, we want to. But we play against Dortmund and BVB have had a very good season. They maintained pressure on us until close to the end.
"This league wasn't similar to last year's or the year before, when we had already secured the title four games before the end of the season. This time we had to fight until the end.
"Matches against Dortmund will always be something special for me. I played there for four years and had a great time. When I score a goal against Dortmund, it's a special feeling. First and foremost, I'm happy when we're winning, of course.
"But when I look at the standings and see that Dortmund are doing very well, I'm happy too. I know that it's better for me, for Bayern and for the Bundesliga if there are two really strong teams in the league."
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