Bosz must prove that he is the right choice to succeed Tuchel at Dortmund

Eight days after Thomas Tuchel left, Borussia Dortmund have appointed a successor to the 43-year-old, who led the side to a German Cup victory in his final match. On Tuesday, BVB unveiled Peter Bosz as their new manager.

There were smiles aplenty as the 53-year-old, who lead Ajax to last season's Europa League final, was introduced, but Bosz faces some immediate questions.

First and foremost, citing of Johan Cruyff's philosophy as a fundamental influence indicates that his playing style is not the same as that of Nice coach Lucien Favre, who topped Dortmund's list of potential Tuchel successors.

Favre, who successfully led his Ligue 1 side to Champions League playoff qualification, has a reactive, pragmatic approach that relies on a strong defence before thinking about going forward.

But Nice did not allow their manager to leave, which led Dortmund to Bosz. On Tuesday, sporting director Michael Zorc insisted the club was fully supportive of the new manager's approach.

"We're convinced with Peter's coaching philosophy, which is similar to the style we and our fans want to see," Zorc said. "Peter's coaching philosophy is a very attacking-minded one. A structured possession football coupled with Gegenpressing. It's a good balance. We also like that Peter is not reluctant to play young players in big games."

When Jurgen Klopp left in 2015, Dortmund had outgrown their role as an underdog. Starting most games as a favourite in the Bundesliga -- except when going up against Bayern Munich -- the team was in desperate need for fresh ideas for what to do with the ball rather than how to behave without it.

Tuchel successfully led that transformation, moulding Dortmund into a side that wants to dictate the match by having possession. In that regard, Bosz will be no different and it should guarantee a smooth transition. For Dortmund, who have had to deal with much turnover within their squad, that is good news.

Bosz has already proven at Ajax that he can develop young talent. In Christian Pulisic, Ousmane Dembele, Alexander Isak and Dan-Axel Zagadou, among others, the new manager will find lots of exciting options. They joined Dortmund on the assumption they will get a chance to play and ensuring things stay that way is vital for the club's transfer strategy, which focuses on purchasing up-and-coming stars.

Unlike Tuchel, Bosz will not be constantly compared to the legendary Klopp but standstill will not be deemed successful and that means he will have to find ways to improve this Dortmund team and bring them at least back to second place in the Bundesliga.

Improving the team's defensive stability, for example, is essential; 40 league goals conceded in 2016-17 were far too many. Bosz wants to please fans with attacking football and has used a defensive approach based on Gegenpressing. He revealed in a Guardian interview that he had a five-second rule for his Ajax side to regain possession.

But for a pressing scheme to work, it must be cohesive. Under Tuchel, BVB too often lacked the ability to be defensively sound when applying a high press.

The introduction of two players Tuchel had wanted to sign last year -- 23-year-old defensive midfielder Mahmoud Dahoud from Borussia Monchengladbach and 27-year-old centre-back Omer Toprak -- should help the new manager bring more balance to the side.

Moreover, on-field success won't be the only criteria for Bosz after Tuchel was sacked for insurmountable differences with club officials and parts of his team.

"We held a lot of talks in recent days," said Watzke. "Once we started talking to Peter Bosz we had a very positive feeling from the outset. Besides the sporting ambition, it was also deciding that we had the feeling that something could grow here."

With a need for chemistry so clearly stated, it must have been somewhat awkward that news has broken that not all was well on Bosz's Ajax's coaching staff; he and assistant Hendrie Kruzen were on one side while other assistants, including Dennis Bergkamp, Hennie Spijkerman, Carlo l'Ami and Bjorn Rekelhof, stood on the other.

Asked to comment on the reported friction back in Amsterdam, Bosz said: "I will only look forward now, not backward." NOS Sport's Matthijs Weststrate told ESPN FC that this should raise some eyebrows in Dortmund, as "Bosz usually is very elaborate in his answers" and that such an answer was very unlike the former Ajax manager.

Dortmund fans will also look forward and hope that Bosz, who speaks fluent German, is a good fit. But after a major falling out with Tuchel, the club is searching for calmness and serenity more than anything else. If they fail to find that with Bosz, telephones in Nice might start ringing soon again.