ATP Buenos Aires 02/12 17:00 25 Federico Delbonis v Florian Mayer 7-6,6-4
Australian Open 01/15 01:15 23 Federico Delbonis v Gilles Muller 5-7,4-6,3-6
ATP Sydney Qual 01/06 03:40 26 Federico Delbonis v Alexei Popyrin 6-4,3-6,3-6
ATP Brisbane 01/02 01:00 25 Federico Delbonis v Michael Mmoh 3-6,4-6
Challenger Lima 10/24 22:00 25 [59] Federico Delbonis v Andrej Martin [166] 2-6,1-6
Challenger Cali 2 10/21 16:00 29 [232] Guilherme Clezar v Federico Delbonis [69] 6-7,5-7
Challenger Cali 2 10/20 19:00 28 [142] Gerald Melzer v Federico Delbonis [69] 1-6,2-6
Challenger Cali 2 10/19 19:00 27 [236] Blaz Rola v Federico Delbonis [69] 6-3,3-6,6-7
Challenger Cali 2 10/18 17:00 26 [247] Inigo Cervantes v Federico Delbonis [69] 6-7,3-6
Challenger Cali 2 10/17 19:20 25 Gonzalo Lama v Federico Delbonis 4-6,6-7
Challenger Buenos Aires 10/13 21:30 27 [128] Gastao Elias v Federico Delbonis [70] 7-5,6-1
Challenger Buenos Aires 10/12 23:00 26 [288] Maxime Janvier v Federico Delbonis [70] 5-7,5-7
Challenger Buenos Aires 10/10 15:30 25 [414] Juan Ignacio Londero v Federico Delbonis [70] 2-6,2-6
Challenger Campinas 10/03 15:00 25 [69] Federico Delbonis v Andrea Collarini [266] 4-6,6-3,3-6
ATP Kitzbuhel 08/01 08:00 25 Renzo Olivo v Federico Delbonis Cancelled
ATP Hamburg 07/29 10:00 28 [138] Leonardo Mayer v Federico Delbonis [81] 6-3,7-5
ATP Hamburg 07/28 09:00 27 [32] Karen Khachanov v Federico Delbonis [81] 5-7,6-3,4-6
ATP Hamburg 07/27 09:00 26 [81] Federico Delbonis v David Ferrer [33] 7-5,6-3
ATP Hamburg 07/25 14:15 25 [94] Carlos Berlocq v Federico Delbonis [81] 7-6,5-7,3-6
ATP Hamburg Qual 07/23 11:00 46 [84] Federico Delbonis v Kenny de Schepper [148] 6-1,6-0
ATP Hamburg Qual 07/22 15:25 45 [84] Federico Delbonis v Jose Hernandez-Fernandez [272] 6-1,6-2
ATP Bastad 07/18 13:15 25 [46] David Ferrer v Federico Delbonis [84] 6-3,6-4
ATP Bastad Qual 07/17 12:50 46 [84] Federico Delbonis v Stephane Robert [248] 6-2,6-3
ATP Bastad Qual 07/17 09:00 45 [84] Federico Delbonis v Markus Eriksson [324] 6-4,6-4
Challenger Perugia 07/11 15:25 25 [88] Federico Delbonis v Guido Andreozzi [157] 6-7,3-6
Challenger Milan 07/02 14:00 29 [97] Federico Delbonis v Guido Pella [114] Retired
Challenger Milan 07/01 11:30 28 [105] Marco Cecchinato v Federico Delbonis [97] 1-6,6-4,0-6
Challenger Milan 06/30 10:15 27 [97] Federico Delbonis v Uladzimir Ignatik [135] 6-1,6-4
Challenger Milan 06/29 09:00 26 [97] Federico Delbonis v Zdenek Kolar [254] 6-3,5-7,6-4
Challenger Milan 06/27 11:15 25 [97] Federico Delbonis v Christopher O'Connell [260] 6-3,6-1

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.