2017 (Senior):
- The Grinder finished her final season with a 17-14 record in singles on court six for the Devils
- Clinched the upset victory over #22 UCLA by rallying to win her match on court six on Saturday, April 15
- Rarely played doubles, but holds a 5-3 record this season
- Pac-12 All-Academic honorable mention
2016 (Junior):
- Finished her regular season with a 14-2 record
- Clinched the match for ASU over Stanford, giving the program its second-ever win over the Cardinal and first since 2008
- Finished the fall season with a 7-2 singles record and an impressive 4-0 doubles record.
- Went undefeated in singles at the UT Fall Invitational.
- Reached the round of 32 of 128 at ITA Regionals in singles play.
2015 (Sophomore):
- Has a 10-3 record between the No.5 and No.6 spot in the ASU line-up. 4-2 in the No. 5 spot and 6-1 in the No. 6 spot.
- Holds an 17-9 overall record on the season, good for a .654 percentage on the year.
- Went 5-4 in doubles during sophomore campaign
2014 (Freshmen):
- Compiled 10 singles wins, including 6 dual match wins.
- Recorded 2 singles wins at the ASU Thunderbird Invitational.
- Had a good come from behind win against No. 46 University of Washington at No. 5 singles, with a score of 1-6, 6-3, 6-3.
High School:
- In 2009 won all three state championships in Victoria, Australia in tennis, cricket and netball.
Personal: Full name is Gussie Matilda O’Sullivan...Majoring in exploratory studies...From Melbourne, Australia...Parents are Shane (manager of Carlton Football Club) and Carol (teacher’s aid) O’Sullivan...Has one brother (Tom) and two sisters (Lillian and Scarlett)...Sister Lillian played professional netball, mother played professional tennis, and father played in Australian Football League...Considers her most exciting moment is sports to be the signing of her letter of intent to attend ASU...Enjoys the Carlton Football Club (AFL), eating vegemite, playing other sports and hanging out with friends...
| Singles | Doubles | |
| Overall | 71-37 | 18-15 |
| 2016-17 | 17-14 | 5-3 |
| 2015-16 | 27-6 | 6-3 |
| 2014-15 | 17-9 | 5-4 |
| 2013-14 | 10-8 | 2-5 |