Dogs trained to pick up out-of-bounds balls at Brazil Open

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Dogs trained to pick up out-of-bounds balls at Brazil Open
A dog picks up a tennis ball during the Brazil Open tournament in Sao Paulo, Brazil, Thursday Feb. 25, 2016. Four trained shelter dogs that once roamed the streets of Sao Paulo found themselves center stage at the ATP 250 Brazil Open tournament. The unusual initiative was made to promote the adoption of abandoned street animals. (AP Photo/Leandro Martins)
A dog picks up a tennis ball during the Brazil Open tournament in Sao Paulo, Brazil, Thursday Feb. 25, 2016. The dog was one of four trained animals that engaged onlookers Thursday night by picking up balls that went out of bounds. Not long ago, the same dogs had run abandoned in Sao Paulo, Brazilâs biggest city. The unusual initiative was made to promote the adoption of abandoned street animals. (AP Photo/Leandro Martins)
Tennis player Roberto Carballes of Spain walks with a couple of dogs during an exhibition game of the Brazil Open tournament in Sao Paulo, Brazil, Thursday Feb. 25, 2016. The dogs were part of a group of trained animals that engaged onlookers Thursday night by picking up balls that went out of bounds. Not long ago, the same dogs had run abandoned in Sao Paulo, Brazilâs biggest city. The unusual initiative was made to promote the adoption of abandoned street animals. (AP Photo/Leandro Martins)
Portugal's Gastao Elias receives a ball from a dog during the Brazil Open tennis tournament in Sao Paulo, Brazil, Thursday, Feb. 25, 2016. Four trained shelter dogs that once roamed the streets of Sao Paulo found themselves center stage at the ATP 250 Brazil Open tournament. The unusual initiative was made to promote the adoption of abandoned street animals. (AP Photo/Leandro Martins)
Tennis players Gastao Elias, left, from Portugal and Roberto Carballes from Spain enter the tennis court with four trained ball retrieving dogs, during an exhibition match of the Brazil Open tournament in Sao Paulo, Brazil, Thursday, Feb. 25, 2016. The four trained shelter dogs that once roamed the streets of Sao Paulo found themselves center stage at the ATP 250 Brazil Open tournament. The unusual initiative was made to promote the adoption of abandoned street animals.(AP Photo/Leandro Martins)
A dog runs after a tennis ball during the Brazil Open tournament in Sao Paulo, Brazil, Thursday, Feb. 25, 2016. Four trained shelter dogs that once roamed the streets of Sao Paulo found themselves center stage at the ATP 250 Brazil Open tournament. The unusual initiative was made to promote the adoption of abandoned street animals. (AP Photo/Leandro Martins)
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In an effort to bring awareness to Brazil's populous animal shelters and to help get stray dogs adopted, four gorgeous canines were trained for months to work as "ball boys" during games.

They made their debut at the exhibition game between Spain's Roberto Carballes Baena and Portugal's Gastao Elias.

Related: See how this adorable dog "does laundry":

Dog Does Laundry

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