Arsene Wenger isn't known as 'Le Professeur' for nothing.
The Arsenal manager's in-depth knowledge of football is second to none.
However, it seems that doesn't extend to actually recognising other coaches.
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The awkward moment
Wenger sat next to what he thought was Sevilla boss Unai Emery during Croatia's last-16 tie against Portugal at Euro 2016 - only to discover in pretty awkward fashion that he was actually talking to the Croatian team doctor, Tomaslav Madzar.
Perhaps he was discussing his native France with the outgoing Sevilla manager, who is set to take over at Ligue 1 champions Paris Saint-Germain.
In fact, Dr Madzar has revealed how the embarrassing scenario played out.
Speaking to Sportske Novosti in an interview brought to our attention by Goal.com, he explained:
“I was talking to David Trezeguet, Wenger shook my hand and congratulated me on the Europa League win with Sevilla.
“Then he asked me if I'd reached an agreement with PSG.”
It would've been great to be a fly on the wall when Wenger realised his mistake.
Fortunately, he wasn't the only one to make the slip-up, as the doctor revealed a number of stewards also mistook him for Emery.
Wenger and his new acquaintance watched on as Croatia and Portugal played out a dreary 0-0 draw, with Portugal finally going through thanks to a Ricardo Quaresma goal late in extra time.
As always, at least the Gunners boss was able to provide everyone with a bit of entertainment, admittedly at his expense.
Has Arsene Wenger lost his touch? Have your say in the comments.