Ok, so they're not, but that doesn't make it any less hilarious.
From the yelps, it's definitely Maria Sharapova they're watching, but we're unable to confirm who she's screaming at.
All they need is some strawberries and cream and unrealistic expectations for average British players and they'll be true fans.
The cats, called the Ninja Kittens by their owner, apparently, er, "studied martial arts, learned how to run, climb, stalk, attack, and now began preparations for the flight to Mars!"
Good for them.
Related on HuffPost:
And it's goodnight from me...
"They're more afraid of you than you are of them," says the koala on the left.
To be honest, we'd probably look like that if we were sat next to Fiona Phillips and only had a glass of water to keep us going.
Katy Perry: singer, patriot, blow-up doll.
Well, that's ONE way to celebrate an election victory.
Roberto Mancini expresses himself in a Gallic manner.
Suddenly, Tom Hanks was regretting his decision to go on a German game show.
Now THAT'S a baby with attitude.
Some horse-racing fans take things a little too far. Such as this woman's parents, for example: Susan and Dobbin.
And you thought it was only British racegoers that got drunk and embarrassing!
Ed Miliband demonstrates exactly how his nasal operation took place.
We think Bo is just out of shot. Or is it Mitt Romney?
Prince Charles picks up a new hat for Camilla.
We realise you might have to take our word for it, but: apparently, this is Russell Crowe.
Merlin the police horse, who can move bollards with his mouth. That is all.
Ronaldo - the most graceful of footballers.
50% of Americans are a bit simple.
David Cameron interviews replacements for Nadine Dorries' job.
Yes, that's how we all look at you, too, Boris.
Your plaice or mine?
Now, we don't know much about body language... but we don't think this looks very good.
Ladies and gentleman: the leader of the Free World!
"I say! Waiter! <a href="http://www.huffingtonpost.co.uk/2012/11/08/huanca-bear-duisburg-zoo-waves-keeper-more-food_n_2091736.html?utm_hp_ref=uk-comedy">Over here!</a>"
On election night, "Uncle Joe" Biden entertains the crowds with his soft-shoe shuffle.
...Not everyone is impressed, however.
Katie Price models her new range of pirate treasure.
Camilla shows off her new baby. Well, it does have its father's ears.
These horses really do get everywhere, don't they?
"What's funny about this picture?", you say? Well, nothing. Except that <a href="http://www.huffingtonpost.co.uk/2012/11/08/kenyan-woman-millicent-owour-names-newborn-twins-barack-obama-mitt-romney_n_2091676.html?utm_hp_ref=pics--giggles">these twin babies are called Barack Obama and Mitt Romney</a>.
Note: Other soft drinks are available. This puppy is also no bigger than a Pepsi/7Up/Fanta can.
And it's goodnight from him!