"No matter their origin or age, when they are loved and fed properly [rescued dogs] can be wonderful companions. [They can] play, learn new things and accomplish great deeds, " Madalena Spinazzola, an organizer, said in a release. "They are dogs that have had difficulties in life, yes. But what we want to show is not the stories suffered in the past, rather to prove that, regardless of what they've experienced, they can be great companions today and in the future!"
Here's footage from last year's Brazil Tennis Open showing the dogs in action.