| ITF M25 Reggio Emilia | 05/17 10:00 | 27 | 포톨리, 로렌조 vs 포니오, 기오바니 | View |
| ITF M25 Reggio Emilia | 05/16 11:10 | 26 | 구에리에리, 안드레아 v 포니오, 기오바니 | 7-6,2-6,2-6 | |
| ITF M25 Reggio Emilia | 05/13 12:05 | 25 | [474] 이안나콘, 페데리코 v 포니오, 기오바니 [304] | 6-3,4-6,6-7 | |
| Challenger Prague | 05/10 12:35 | 27 | [295] 베셀리, 지리 v 포니오, 기오바니 [304] | 2-6,6-1,6-4 | |
| Challenger Prague | 05/09 12:15 | 26 | [304] 포니오, 기오바니 v 본지, 벤자민 [175] | 7-6,3-6,6-2 | |
| Challenger Prague | 05/08 11:45 | 25 | [304] 포니오, 기오바니 v 블란카네우, 게오프레이 [236] | 7-6,6-3 | |
| Challenger Prague | 05/06 08:30 | 19 | 포니오, 기오바니 v 바실라시빌리, 니콜로즈 | 4-6,2-6 | |
| Challenger Prague | 05/05 08:30 | 14 | [301] 포니오, 기오바니 v Colson, Tibo [453] | 6-2,6-0 | |
| Challenger Tallahassee | 04/15 21:30 | 25 | 포니오, 기오바니 v Joel Schwaerzler | 2-6,4-6 | |
| Challenger Sarasota | 04/09 20:30 | 25 | [195] 리츠찰드, 알렉산더 v 포니오, 기오바니 [304] | 6-3,6-1 | |
| Challenger Sarasota | 04/08 16:50 | 19 | [304] 포니오, 기오바니 v 에드문드, 킬 [423] | 6-2,6-3 | |
| Challenger Sarasota | 04/07 20:10 | 14 | 포니오, 기오바니 v Vale, Duarte | 6-3,6-4 | |
| Challenger Mexico City | 04/02 19:30 | 25 | [302] 포니오, 기오바니 v 메지아, 니콜라스 [344] | 3-6,2-6 |
Giovanni Fonio (born 7 May 1998) is an Italian tennis player. He took his first steps in tennis at the age of 5, at the Piazzano tennis club in Novara.
Fonio has a career high ATP singles ranking of 274 achieved on 4 Dicember 2023. He also has a career high doubles ranking of 406 achieved on 15 January 2024.
Fonio has won 2 ATP Challenger doubles title: at the 2023 Internazionali di Tennis del Friuli Venezia Giulia with Francesco Forti and at the 2021 Antalya Challenger III with Riccardo Bonadio.
The greatest victory achieved by Giovanni was certainly during the Yokkaichi Challenger in Japan, on 30 November 2023, when he beat the then top 100 player Yosuke Watanuki in 3 sets (3-6 / 6-2 / 7-5).
An important presence in high-level tournaments was certainly in May 2022 at the qualifiers at the Internazionali d’Italia, unfortunately he lost against Emil Ruusuvuori 2-1 (4-6 / 7-6 / 3-6).