India's tennis star Sania Mirza has lent her support to the cause of animal welfare, calling for adoption of homeless dogs and cats in a new ad campaign for People for the Ethical Treatment of Animals (PETA).Sania, who became the first female tennis player from India to achieve the world number one rank in doubles along with partner Martina Hingis in April, stars with her rescued cat, Posh in the adorable print ad.The ad, which is the main feature of the campaign, was shot by ace photographer YSN Murthy. The hair-styling and make-up were done by Tamanna Rooz, and Esha Amin styled the outfit. "So many animals, especially dogs, are hit by cars and they just lie there for days. That's the reason we need to rescue or take them from a shelter and not buy," said Sania, who is currently playing at the ongoing French Open tennis tournament.