Extract from new book about Pep Guardiola's first season in charge of Bayern Munich
"You can write about everything you see and be as critical as you like in the book, but during the season please don't talk to the outside world about what you witness inside" Those were the words from Pep Guardiola,one of the most successful football managers of all time, to Marti Perarnau in 2013, when he stunned the Spanish journalist by giving him complete behind-the-scenes access to his first season in charge of Bayern Munich. Over the next year, Perarnau would be privy to every training session and team-talk, an unprecedented level of insight into one of the world's biggest clubs which he chronicles in a new book,Pep Confidential: Inside Guardiola's First Season at Bayern Munich. In this extract, Perarnau witnesses Guardiola's late-night celebrations after his team sealed the Bundesliga title in March, a record for any of Europe's top leagues - and the manager's ruthless dedication as he immediately plots further victories

During the dressing-room celebrations in Berlin, [Franck] Ribery split [assistant coach] Manel Estiarte's lip.
With seven games still to play Bayern had won the Bundesliga title. They had faithfully applied and even exceeded the objectives set out by Pep's recipe for winning a league: don't lose it in the first eight matches and then nail it in the last eight. After today's game, they were 25 points ahead of Borussia Dortmund with only 21 still up for grabs. They had beaten his formula by seven [match] days.
This was the seventh consecutive time that Bayern had clinched the title away from home and they had done so with style. They were two up within 12 minutes and looked unstoppable.
Pep altered the plans for the game which had been constructed over the previous few days and asked the two wing-backs to play wide, not inside. It was based on his understanding that Hertha would man-mark; if he put Rafinha and Alaba wide whilst attacking it would oblige Hertha to defend with six guys in a defensive line in order to cover the two wing-backs, the wingers, the striker and an attacking midfielder. That would mean that the middle of the pitch would be open territory for Bayern.
At 2am, Pep Guardiola stepped on to the dance floor, a novel spectacle for even his closest friends, who were more used to seeing him sitting surrounded by friends and colleagues chatting about a million and one things, most of them related to football
As planned, Mueller, Goetze, Robben, Kroos and Schweinsteiger took total control of the midfield and at half-time, with the title pretty much in the bag, several players commented to Pep that things had gone precisely as he predicted they would.