He has an outstanding junior record

Kyrgios is a former world junior number one and won the Australian Boys Open in 2013 without dropping a set, following in the footsteps of Luke Saville in 2012 and a 15-year-old Bernard Tomic in 2008. Some other big names to win Grand Slam junior titles include Roger Federer, Andy Roddick and Andy Murray. The 19-year-old has also won three Grand Slam junior doubles titles with Australian Andrew Harris, including the French Open and Wimbledon in 2012.

A Canberra boy through and through

Kyrgios was born in Canberra to his Greek father George and his Malaysian mother Norlaila. The 19-year-old resides in the nation's capital or Melbourne when he's not touring the world on the circuit.

He's the highest-ranked teenager in the world

With a senior ranking of 1267 two years ago, Kyrgios rose to 214 this time last year. He began Wimbledon at number 144 in the world, but that figure is sure to rise considerably after he booked a place in the quarter-finals after an epic defeat of world number one Rafael Nadal. The last time a teenager broke into the top 100 was three years ago when, you guessed it, Bernard Tomic made the quarter-finals of Wimbledon.

Wimbledon is  the first time he's beaten anyone in the top 10 ...

Before Wimbledon, Kyrgios' best effort this year was a 6-3, 6-7, 6-2, 7-6 win over 81st-ranked Ben Becker in the first round of the Australian Open. Prior to Wimbledon he was 0-3 against players  in the top 10. The Canberra boy was towelled up in straight sets by ninth-ranked Milos Raonic in his opening match of this year's French Open, beaten by Richard Gasquet in a Davis Cup tie and also given a touch-up by fifth-ranked David Ferrer in last year's US Open.

And the first time a teenager has beaten a world number one since 2005

Ironically, the last teenager to beat a world number one was Rafael Nadal in 2005 when he knocked off Roger Federer at the French Open. He's also the first player on debut to make the quarter-finals of Wimbledon since Florian Mayer in 2004.

There are five Aussies who are ranked higher than Kyrgios ... although not for long

Lleyton Hewitt (48), Marinko Matosevic (58), Matthew Edben (85), Bernard Tomic (86) and Samuel Groth (124) all sit above Kyrgios for the time being on the ATP rankings, but that will change after Wimbledon.

Idolises Roger Federer

He spent a week training with the Swiss maestro in Zurich last month. ''He's my idol. Just to get to see how he thinks out on the court ... to play Roger would be a dream.''

His sister is a model and music theatre performer

Halimah Kyrgios received a scholarship to attend the McDonald Performing Arts College in Sydney before completing a Bachelor of Arts in Musical Theatre in Singapore. She models, acts, sings and dances. His elder brother Kristos is a 27-year-old lawyer.

He's the lowest-ranked player to beat Nadal for eight years

The last time Rafael Nadal lost to a player as low-ranked as Kyrgios was to world number 690 Joachim Johansson at 2006 in Stockholm. It's also the lowest-ranked player the Spaniard has lost to in a Grand Slam. Tough times.

Could have forged a career in basketball

At the age of 14, Kyrgios had to give up his beloved basketball to concentrate on his tennis.

''It was probably the toughest decision I had to make, but my family was pretty keen on me taking up tennis. I love to play sports a lot so it was an easy transition to fully concentrate on tennis. It's a choice I'm not regretting,'' Kyrgios told ATP's website.