SOPHOMORE (2023-24)
Prior to ASU
- 4-4 singles record, competing from the sixth position in 9 of his 11 matches.
- Compiled a 4-8 doubles record.
- Made it to the Final round of the Battle of the Bay doubles with Max McKennon.
- Went to the US Open Juniors where he won a pair of qualifying matches over Marko Mesarovic (USA, 3-6, 7-5, 10-7) and Manfredi Graziani (Switzerland, 7-6, 6-4). Koshis was eliminated in round one of the main draw after a 6-3, 6-4 loss to Michigan State's Ozan Baris.
- Competed in 22 singles matches. Gained wins over No. 32 Baylor and No. 69 Liberty.
- Competed in 22 doubles matches with various partners. Among his seven wins, Koshis defeated No. 32 Baylor, No. 9 USC, No. 27 Utah, and No. 24 Illinois.
Prior to ASU
- No. 67 ITF Jr.
- French Open Juniors
- Australian Open Juniors
- Wimbledon Juniors
- Five titles since 2019