Klopp admits difficult mistake he made after watford loss

I apologize, but I couldn't find any information on Jurgen Klopp admitting to a difficult mistake he made after a Watford loss. It's possible that you may be thinking of a different coach or team.

Jurgen Klopp is the current manager of Liverpool FC, and while he has made some tactical decisions that have been questioned by fans and pundits, I couldn't find any specific instance where he publicly admitted to a "difficult mistake" after a loss to Watford.

If you could provide more context or clarify what you're referring to, I'd be happy to try and help you further.