Richard Branson -- I Smashed My Teeth with a Tennis Racket (Pic)

File Under: "When Tennis Goes Very VERY Wrong."

Here's the smashed face of Virgin billionaire Richard Branson ... moments after he bashed himself in the mouth with a tennis racket -- in a leisure activity gone bad.

Branson says he was playing a match on the tennis court at the insane Moskito Island resort in the British Virgin Islands -- when he took a swing and accidentally ate racket.

"I went for a lob…and somehow ended up smashing my two front teeth with my racquet! I’ve heard of tennis elbow, but this was tennis teeth. As you can see from the photo, it was not pretty."

Branson says he contacted a local dentist who fixed his grill -- and he was back out on the court the next day.

Meantime, check out the island resort where the accident went down ... it's good to be mega-rich.