Blind Spot

From "Perplexing Lateral Thinking Puzzles" by Paul Sloane & Des MacHale.

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At a dinner to celebrate the end of the Wimbledon tennis championship, the men's singles winner turned to the man next to him and said,

"There's something here which you can see and all the other men can see, but which I cannot see."

What was it?

Hints for Blind Spot!

Solution to Blind Spot!