It was a big night on centre court for teenager Destanne Aiava as she came face-to-face with 2018 US Open Champion Naomi Osaka.
For Osaka, it was her first night on court being one of the highest seeded players at the tournament. She marked her first return to the Brisbane International since 2016 with a straight sets win 6-3 6-2 and become the first player to reach the quarter-finals.
Despite the scores, Aiava and Osaka put on a great battle for the crowd at Pat Rafter Arena with the 18-year-old Australian able to match the world no.5's power and overall game style.
Meanwhile, Osaka didn't lose a serve during the match and saved all six break points she faced.
Throughout the match the distance cries of 'Aussie Aussie Aussie, Oi Oi Oi' could be heard on Show Court 1 but a few members inside the Arena also tried to get the famous cry going.
It's a chant that the Japanese No.1 loves.
"I don’t know, I just love it when you guys say ‘Aussie, Aussie, Aussie, Oi, Oi, Oi!,” she said.
In other matches today, world No.46 Tomljanovic stormed home to beat Katerina Sinakova 1-6 6-3 6-0 and is now flying the flag for Australian in women's singles draw.
It was a shaky start for the 25-year-old but she was able to flip the momentum around and now faces 2016 Australian Open semi-finalist Johanna Konta. After the Tomljanovic said she wasn't having the best game out on the court.
"It's always nice to win, especially on the new year but I felt kind of scrappy all around," she said.
"I feel like first matches always are, but I kind of feel extra kind of off today.
"So even if I lost, I [wanted to] start playing better and just put a better performance in then slowly it started going my way, and I just kind of kept at it."
For fellow Australian, Daria Gavrilova it wasn't the start to 2019 she would have hoped for.
She bowed out in the first round to eighth-seeded Latvian Anastasija Sevastova in straight sets 6-3 6-3.
After beating world No.10 Daria Kasatkina yesterday, Kim Birrell wasn't able to advance to the next round falling to Lesia Tsurenko 6-4 6-3.