Why do so many professional tennis players have relatives who played other pro sports? (poll 4446418)

Why do so many professional tennis players have relatives who played other pro sports?

Their relatives forced them to start young, so they got a head-start.

Training- those who know, can train you for any sport, even if it wasn't their sport.

Genetics- they were born with it, baby!

They grew up around it, which took the mystique out of the equation.

Other:

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