Munich - Off the Ball, bundesliga.com's weekday feature, casts an eye over some of the offbeat and occasionally controversial tales to have emerged from Germany's top flight sides.

Today, we learn how Pep Guardiola intends to make life harder for the opposition, find out the inspiration behind Sidney Sam's new hairdo and catch up with mischievous BVB head coach Jürgen Klopp...

Though open training sessions are nothing new in the fan-friendly Bundesliga, FC Bayern have been limiting public access to their training ground lately, in an attempt to deny the competition a glimpse at the FIFA Club World Champions' recipe for success. "Our opponents are there all week [to watch us]. It's no good when they know how we approach the game," explained coach Pep Guardiola following Bayern's decision to erect some extra fencing around the practice pitches at Säbener Strasse.

Having missed the last five matches of the first half of the current season through injury, was keen to start 2014 on a positive note. "I wanted to do something new for the New Year," said the 26-year-old, who emerged for Bayer 04 Leverkusen's 2-1 Matchday 19 win over VfB Stuttgart with a new haircut. "My hairdresser in Cologne came up with the idea. It's sometimes good to have a change." Considering Sam helped Bayer end a three-game losing streak, he may well have a point...

Known for his fun, outgoing character, Borussia Dortmund head coach Jürgen Klopp is always up for a laugh. After already going viral when photo bombing and a young fan, the 46-year-old struck in similar fashion again recently, hopping in on a photo of BVB midfielder and his partner. "I have no idea what I was thinking," said Klopp when asked about his schoolboy-style prank. Borussia stars, watch out - you may well be next on Klopp's to-do list.