Bayern Munich's history of success in German football can often see the term "crisis" thrown around the moment points are dropped, but with the team sitting fifth in the Bundesliga after seven games, there is little doubt all is not well.Bayern host Bayer Leverkusen on Friday night winless since mid-August, an unfamiliar position for a club which is vying for 11 titles in a row.Bayern's struggles are mirrored by those of the misfiring Sadio Mane, with the summer arrival goalless in five matches after scoring five times in his opening six games.Sporting Director Hasan Salihamidzic has backed the summer arrival to rekindle his early season form, saying the former Liverpool striker "needs a bit of time to get used to the Bundesliga"."I know what it's like to arrive as a newcomer in a team, in another country, another city, a slightly different football culture," Salihamidzic, who moved from his native Bosnia to play for Hamburg as a 15-year-old, told Germany's Sportbild."Sadio is in this process, everything will soon be more familiar to him and we will soon see that on the pitch."Bayern president Herbert Hainer promised on Wednesday "we'll see a whole different team on Friday - and a winning team too", saying his side "will step on the gas" against the visiting Leverkusen.Munich's opponents on Friday are also going through a rough patch, with the visitors having won just one from seven to start the season to sit in 15th alongside an early German Cup exit.Munich manager Julian Nagelsmann hailed as a potential 10-year coach at the club even before winning the Bundesliga title last year, is going through the toughest time, overseeing Bayern's longest winless run in more than two decades.Never a good omen, Salihamidzic told the