Roger Federer poses with quokka, Twitter goes 'Awwww' in response

Roger Federer has posted a picture with a quokka on Twitter, which has led to a heart-warming reaction amongst his fans - with almost everyone calling the picture cute.

Federer had a good year on the tennis court as he started the season with a win at the Australian Open, beating arch-rival Rafael Nadal in the final to take the coveted trophy home. At the age of 35 years and 5 months, he became the oldest player to take part in the final of the Australian Open since Ken Rosewall in 1974.

The Swiss ace then won the Wimbledon Championships, defeating Marin Cilic in the final to win the title for the 8th time, and a Grand Slam for a massive 19th time.

Incidentally, he partnered his nemesis Nadal for the first time in a doubles match earlier this year too - at the Laver Cup.

Meet my new furry friend. So happy to be back down under ?#HappyQuokka @westernaustralia #justanotherdayinWA pic.twitter.com/YvgdMCs13u

— Roger Federer (@rogerfederer) December 28, 2017

Heard the name quokka for the first time?

The quokka is considered the happiest animal in the world and is definitely a cute sight to look at which will make even the grumpiest grandma in the world smile. However, the furry little animal has been known to bite people in certain cases.

The animal has adapted to human presence and is known to coax human beings for food and entertainment. It is illegal to own a quokka in the Rottnest Island, and doing so warrants a fine of $300.

When Federer posted a selfie with the quokka, naturally there was an outburst of reactions from his fans.

OMG look at you Roger !! You look healthy and happy I’m so excited to start new season in 2018!!! Let’s move 20th ??????

— Jen lee (@JenNypatissier) December 28, 2017

Not sure who is cuter ??

— Gothami #RF19 (@RFanforlife) December 28, 2017

THE CUTEST THING I'VE EVER LAID MY EYES UPON

— Riccardo Fidirir (@stormberry) December 28, 2017

YOU'RE THE CUTEST, REALLY ???

— Juli. {Fedanz?} (@TenistaDeSanz) December 28, 2017

He looks so happy to be with you! ??

— AdamantGirl (@b_elaine_) December 28, 2017

Twins ?

— Quintin Schevernels (@Quintin24) December 28, 2017

FuRFriend. .???

— Sunita Sigtia (@sunitasigtia) December 28, 2017

Aww cute! ???

— AdamantGirl (@b_elaine_) December 28, 2017

It's so cute , awwww

— Dr Ayesha (@DrAyeshaNaveed) December 28, 2017

Sooooo cute with smile ??? pic.twitter.com/ZP31sSvvQ9

— prabu (@prabuv678876) December 28, 2017

OMG this photo is amazing. All animals love you Roger.

— V1sh9u (@Rfighterer) December 28, 2017

Thanks for visiting our @RottnestIsland, @rogerfederer - quokka selfies are a must! Will see you on the court next month at the @hopmancup in @WestAustralia! pic.twitter.com/soRy6SChFG

— Mark McGowan (@MarkMcGowanMP) December 28, 2017

The Federer fans certainly had a hard time deciding who is the cuter of the two -- their tennis hero, or the happiest animal in the world.