Ever since the Australian Open draw came out everyone was hoping for a fourth round showdown between boom teenager Bernard Tomic and world No.3 Roger Federer and on Sunday night it becomes a reality.
Tomic has been the story of the tournament so far with three quality victories to give local fans hope of a first Australian champion since Mark Edmonson beat John Newcombe in the 1976 final.
The 19-year-old opened his campaign with a stunning comeback win over 22nd seed Fernando Verdasco before a tight four-set triumph over Sam Querrey.
But it was his epic five-set victory over 13th seed Alexandr Dolgopolov that has people believing he can go all the way.
However, standing in his way is arguably the greatest player of all time who will become just the seventh man in history to notch 1000 ATP Tour matches.
Federer's path to the Round of 16 has been far less spectacular with two workmanlike wins over qualifier Alexander Kudryavtsev and Ivo Karlovic either side of a walkover after Andreas Beck withdrew from their second round match.
The two have met just once before with Federer needing four sets in their Davis Cup clash on grass last September.
Also working in the 16-time Grand Slam champion's favour is the fact he has been on court for just 235 minutes compared to 613 minutes by Tomic.
Whatever happens it promises to be a gripping contest and another opportunity for Tomic to match it with one of the best players on tour.
Following the feature match is world No.1 Caroline Wozniacki, who takes on Serbian 13th seed Jelena Jankovic.
Wozniacki, who is still aiming for his first Grand Slam title, has flown under the radar so far with three pretty straightforward victories.
Jankovic has also progressed with relatives ease and will head into the clash full of confidence having beaten the Dane four times from seven meetings, although Wozniacki has been victorious the past three times - all of which were last year.
Headlining the day session is second seed Rafael Nadal, who plays fellow Spaniard Feliciano Lopez in what should be a comfortable victory for the 2009 champion.
Opening proceedings is world No.3 Victoria Azarenka against Iveta Benesova, while defending champion Kim Clijsters takes on fifth seed Li Na in a repeat of last year's final.
Clijsters holds a 5-2 winning record over the Chinese woman, but Li was victorious in the final of the Sydney International last year.
German 22nd seed Julia Goerges plays eighth seed Agnieszka Radwanska at Hisense Arena with men's seventh seed Tomas Berdych's clash against 10th seed Nicolas Almagro to follow.
Finally, ground pass holders can see 11th seed Juan Martin del Potro in action when he takes on Phillip Kohlschreiber on Margaret Court Arena.