VIDEO: Dortmund's pre-match training routine is bizarre

Ahead of Thursday's vital Europa League quarter-final second leg at Liverpool, Borussia Dortmund players partook in a rather unique warmup drill at the home of Marine FC, a seventh-tier team based in Crosby, Merseyside.

With Thomas Tuchel and his coaching team looking on, each member of the squad attempted to bounce the ball off the crossbar before nodding it home.