London, UK, 24 June 2014 | AAP

Australian qualifier Luke Saville has made a spectacular Wimbledon main draw debut, upsetting highly-rated Austrian Dominic Thiem in the first round.

Former top-ranked junior Saville defied his world ranking of 236th to win 7-5 6-4 3-6 6-4 on Monday and join compatriots Bernard Tomic and Marinko Matosevic in the second round.

The triumph over 57th-ranked Thiem is by far the biggest win of 20-year-old Saville’s career.

“There’s no doubt I probably haven’t kicked on as much as a lot of people would have hoped, including myself,” Saville said.

“Not everyone can do a Nick Kyrgios or a Bernard Tomic and just burst onto the scene and become top 150 in their first six months out of juniors.

“It’s been a bit of a rollercoaster but I feel like I’m reaping the rewards (of hard work and perseverance) and to qualify and win a round is unbelievable right now.”

Saville beat the top seed en route to qualifying for a place in the main draw and Monday’s win was his first at tour level.

“Not a bad place to do it,” he said.

His only previous Grand Slam appearance came with a wild card entry at last year’s Australian Open.

Saville, a junior Wimbledon and Australian Open champion, will next face Bulgarian 11th seed Grigor Dimitrov, who defeated American Ryan Harrison 7-6(1) 6-3 6-2.