ATP Rome 05/12 12:10 25 [64] Federico Delbonis v David Goffin [13] 6-2,6-1
ATP Rome 05/10 11:10 24 [24] Karen Khachanov v Federico Delbonis [64] 6-3,4-6,0-6
ATP Rome 05/09 11:05 19 [66] Frances Tiafoe v Federico Delbonis [77] Retired
ATP Rome 05/08 13:35 14 [91] Marcos Giron v Federico Delbonis [77] 3-6,3-6
ATP Madrid 05/06 17:35 26 [10] Matteo Berrettini v Federico Delbonis [77] 7-6,6-4
ATP Madrid 05/05 12:15 25 [37] Albert Ramos-Vinolas v Federico Delbonis [77] 6-7,3-6
ATP Madrid 05/03 19:10 24 [77] Federico Delbonis v Pablo Carreno-Busta [12] 3-6,6-4,6-3
ATP Madrid 05/02 10:00 19 [97] Juan Ignacio Londero v Federico Delbonis [79] 4-6,4-6
ATP Madrid 05/01 12:45 14 [133] Bernabe Zapata Miralles v Federico Delbonis [79] 6-7,6-7
ATP Belgrade 04/23 15:00 27 [126] Taro Daniel v Federico Delbonis [84] 4-6,6-1,7-5
ATP Belgrade 04/22 12:30 26 [84] Federico Delbonis v Dusan Lajovic [37] 6-3,2-6,6-4
ATP Belgrade 04/20 10:00 25 [89] Ricardas Berankis v Federico Delbonis [84] 4-6,6-3,1-6
ATP Monte Carlo 04/14 12:25 25 [87] Federico Delbonis v Rafael Nadal [3] 1-6,2-6
ATP Monte Carlo 04/13 09:00 24 [87] Federico Delbonis v Adrian Mannarino [34] 7-5,6-1
ATP Monte Carlo 04/11 09:00 19 [100] Pedro Martinez v Federico Delbonis [85] 6-3,3-6,4-6
ATP Monte Carlo 04/10 12:10 14 [191] Roberto Marcora v Federico Delbonis [85] 2-6,5-7
ATP Marbella 04/07 10:00 26 [99] Norbert Gombos v Federico Delbonis [85] 5-7,7-6,7-6
ATP Marbella 04/05 15:50 25 [98] Roberto Carballes Baena v Federico Delbonis [85] 5-7,1-6
ATP Miami 03/25 16:45 23 [60] Jordan Thompson v Federico Delbonis [80] 7-6,6-4
ATP Santiago 03/13 20:00 28 [118] Facundo Bagnis v Federico Delbonis [86] 7-5,6-3
ATP Santiago 03/12 16:30 27 [86] Federico Delbonis v Holger Vitus Nodskov Rune [410] 6-3,6-3
ATP Santiago 03/10 19:10 26 [86] Federico Delbonis v Andrej Martin [104] 6-0,6-3
ATP Santiago 03/09 15:00 25 [86] Federico Delbonis v Jaume Munar [102] 6-4,6-7,6-4
ATP Buenos Aires 03/03 21:00 26 [86] Federico Delbonis v Laslo Djere [60] 6-7,3-6
ATP Buenos Aires 03/02 23:00 25 [86] Federico Delbonis v Juan Manuel Cerundolo [181] 6-4,7-6
ATP Cordoba 02/24 22:10 26 [130] Facundo Bagnis v Federico Delbonis [84] 6-4,7-5
ATP Cordoba 02/24 00:55 25 [108] Pedro Sousa v Federico Delbonis [84] 4-6,4-6
Australian Open 02/08 05:00 23 Federico Delbonis v Juan Ignacio Londero Cancelled
ATP Great Ocean Road Open 02/02 05:05 24 [320] Matthew Ebden v Federico Delbonis [77] 6-3,7-6
ATP Great Ocean Road Open 02/02 04:40 24 Damir Dzumhur v Federico Delbonis Cancelled

Wikipedia - Federico Delbonis

Federico Delbonis (Spanish pronunciation: [feðeˈɾiko ðelˈβonis]; born 5 October 1990) is an Argentine former professional tennis player. He achieved a career-high ATP singles ranking of No. 33 on 9 May 2016. He also reached a career-high doubles ranking of No. 110 on 22 July 2019.

Delbonis was known for his unorthodox serve, an exaggerated trophy serve in which he would raise his racquet, toss the ball unusually high and follow through.