Who amongst these are tennis players: Virat Kohli, Roger Federer, Rafael Nadal, Novak Djokovic, Serena Williams, PV Sindhu, Virender Sehwag, Maria Sharapova, Steffi Graf, Venus Williams.
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### Instruction:
Who amongst these are tennis players: Virat Kohli, Roger Federer, Rafael Nadal, Novak Djokovic, Serena Williams, PV Sindhu, Virender Sehwag, Maria Sharapova, Steffi Graf, Venus Williams.

### Response:

Roger Federer, Rafael Nadal, Novak Djokovic, Serena Williams, Maria Sharapova, Steffi Graf, Venus Williams are tennis players.