What do you think a top team do in preparation for a Champions League game? Video analysis meetings, professional massages and scientifically balanced pre-match meals, right?

Apparently not. In the case of Borussia Dortmund, one of Europe's elite clubs, their final preparations resemble those of the average Sunday League team.

Ahead of tonight's big clash at with Arsenal at The Emirates, Jurgen Klopp's side have been doing their final training session at Regent's Park in central London. That's the same public park where people go for a kickabout, jumpers-for-goalposts-style.

We're not making this up. Mats Hummels and his pals have been doing drills among the dogwalkers and joggers. Look, Dortmund even tweeted about it: 

Watch out for the dog muck, chaps. Oh, and for future reference, doing set-piece work in front of the general public is not a great idea in the era of camera phones and Twitter…

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