One in eight British men reckon they could win a point in a tennis match against former world number one Serena Williams.
Asked by UK polling service YouGov, 'Do you think if you were playing your very best tennis, you could win a point off Serena Williams?' 12 percent of men said they reckoned they could.
Only 3 percent of women had the same level of confidence in their abilities. Twelve percent of respondents weren't sure.
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The reaction on social media was brutal.
"Unless only eight men were surveyed and one of them was Nadal, these men are what's known in tennis terms as 'f**king deluded'," one person wrote on Twitter.
"None of us would even be able to return her serve lol," said another.
But it was Twitter user @longwall26 perhaps summed it up best.
"Confident in my ability to properly tennis, I take the court. I smile at my opponent. Serena does not return the gesture. She'd be prettier if she did, I think. She serves. The ball passes cleanly through my skull, killing me instantly."
Williams is one the most successful tennis stars of all-time, and has spent 319 weeks of her career as number one in the world. She did play against a man in 1998 when she was 16 - 203rd-ranked Karsten Braasch - who beat her 6-1.