Roger Federer was featured in a question on Celebrity Jeopardy but went unrecognized as nobody could name him.
Roger Federer is quite recognizable around the world but nobody recognized him in an episode of the game show Celebrity jeopardy that features other celebrities. The show is hosted by The Big Bang Theory actress Mayim Bialik and featured actor John Higgins, comedian Joel Kim Booster and actor Will Wheaton.
They were shown a picture of Federer with the following description:
"Winner of 20 Grand Slam singles titles, this tennis great recently announced his retirement from competitive play."
None of them were able to name the person in question not even a name or surname despite it being arguably the best player of all time. He's by far the most popular one so that was rather strange.