The BVB CEO has conceded it will be nearly impossible for his side to challenge the reigning champions in the years to come

Borussia Dortmund supremo Hans-Joachim Watze believes it inevitable that Bayern Munich will win the Bundesliga title again in 2015-16 given the imminent arrival of Arturo Vidal from Juventus.

The reigning German champions announced on Thursday that the Chile international will sign a contract with FCB upon completion of his medical and Watzke now has little doubt that the Bavarians will not only win a fourth successive title - but also a fifth.

"For me, Vidal is one of the best players there is in midfield," Watzke told DPA.

"He is a real warrior and is great on the ball as well. Signing him is a superb transfer for Bayern and will definitely improve them.

"We can stop wondering who will win the Bundesliga title this season. Bayern will be the first team ever to win the title four seasons in a row. And then next year a fifth time..."

Dortmund were the last team to pip Bayern to Bundesliga glory, in 2012, but Watzke has conceded that BVB need time before they can challenge the Bavarians once more.

"Over a period of 10 years, Dortmund have always won silverware and we will win trophies again in the future," he added. "But, at the moment, we have other objectives."