| Challenger Santiago | 10/11 21:00 | 25 | [157] Juan Ignacio Londero v Gonzalo Lama [327] | 6-2,3-6,6-1 | |
| Challenger Santiago | 10/05 14:00 | 25 | [157] Juan Ignacio Londero v Thiago Agustin Tirante [206] | 2-6,3-6 | |
| US Open | 08/25 15:00 | 14 | [280] Christian Harrison v Juan Ignacio Londero [153] | 6-4,6-2 | |
| ATP Kitzbühel | 07/24 09:00 | 26 | Juan Ignacio Londero v Lukas Neumayer | Retired | |
| ATP Gstaad | 07/20 15:05 | 25 | [105] Tallon Griekspoor v Juan Ignacio Londero [140] | 7-5,4-6,7-6 | |
| Challenger Salzburg | 07/10 11:50 | 28 | [87] Federico Coria v Juan Ignacio Londero [129] | 6-1,6-4 | |
| Challenger Salzburg | 07/09 16:00 | 27 | [129] Juan Ignacio Londero v Pablo Cuevas [84] | 6-3,6-0 | |
| Challenger Salzburg | 07/08 09:00 | 26 | [129] Juan Ignacio Londero v Alexey Vatutin [317] | 6-0,2-6,6-0 | |
| Challenger Salzburg | 07/06 10:55 | 25 | [103] Taro Daniel v Juan Ignacio Londero [129] | 4-6,4-6 | |
| Wimbledon | 06/29 17:35 | 23 | [129] Juan Ignacio Londero v Gianluca Mager [77] | 6-7,0-6,6-4,3-6 | |
| French Open | 05/30 13:05 | 23 | [100] Juan Ignacio Londero v Cristian Garin [23] | 6-3,4-6,6-7,2-6 | |
| Challenger Oeiras | 05/17 11:30 | 25 | [158] Leonardo Mayer v Juan Ignacio Londero [95] | 4-6,6-1,6-4 | |
| ATP Řím | 05/08 10:05 | 14 | [58] Tommy Paul v Juan Ignacio Londero [99] | 7-6,6-3 | |
| ATP Madrid | 05/02 10:00 | 19 | [97] Juan Ignacio Londero v Federico Delbonis [79] | 4-6,4-6 | |
| ATP Madrid | 05/01 12:15 | 14 | [49] Laslo Djere v Juan Ignacio Londero [97] | 3-6,6-3,2-6 | |
| ATP Estoril | 04/27 09:30 | 25 | [97] Juan Ignacio Londero v Richard Gasquet [52] | 3-6,5-7 | |
| ATP Estoril | 04/24 13:20 | 14 | Juan Ignacio Londero v Carlos Taberner | Cancelled | |
| ATP Bělehrad | 04/20 10:00 | 25 | [129] Arthur Rinderknech v Juan Ignacio Londero [97] | 6-1,7-5 | |
| ATP Bělehrad | 04/20 09:00 | 25 | Laslo Djere v Juan Ignacio Londero | Cancelled | |
| ATP Monte Carlo | 04/14 11:00 | 25 | [37] Filip Krajinovic v Juan Ignacio Londero [94] | 6-0,6-3 | |
| ATP Monte Carlo | 04/11 09:00 | 19 | [54] Dominik Koepfer v Juan Ignacio Londero [94] | 6-1,6-3 | |
| ATP Monte Carlo | 04/10 10:20 | 14 | [280] Mischa Zverev v Juan Ignacio Londero [94] | 4-6,1-6 | |
| ATP Marbella | 04/05 14:35 | 25 | [99] Norbert Gombos v Juan Ignacio Londero [94] | 6-7,6-1,6-3 | |
| ATP Buenos Aires | 03/01 21:00 | 25 | [57] Pablo Andujar v Juan Ignacio Londero [90] | 6-3,6-0 | |
| ATP Córdoba | 02/23 22:15 | 25 | [88] Juan Ignacio Londero v Albert Ramos-Vinolas [47] | 6-4,2-6,2-6 | |
| Australian Open | 02/08 05:10 | 23 | [209] Alexandre Muller v Juan Ignacio Londero [81] | 4-6,6-3,6-0,6-3 | |
| Australian Open | 02/08 05:00 | 23 | Federico Delbonis v Juan Ignacio Londero | Cancelled | |
| ATP Murray River Open | 02/02 02:50 | 24 | [81] Juan Ignacio Londero v Mikhail Kukushkin [90] | 6-4,5-7,2-6 | |
| Challenger Parma | 10/06 09:40 | 25 | [108] Alexei Popyrin v Juan Ignacio Londero [69] | Retired | |
| French Open | 09/30 15:15 | 24 | [69] Juan Ignacio Londero v Marco Cecchinato [110] | 3-6,2-6,7-5,2-6 |
Wikipedia - Juan Ignacio Londero
Juan Ignacio Londero (* 15. srpna 1993 Jesús María, Córdoba) je argentinský profesionální tenista. Ve své dosavadní kariéře na okruhu ATP Tour vyhrál jeden singlový turnaj. Na challengerech ATP a okruhu ITF získal šest titulů ve dvouhře a sedm ve čtyřhře.
Na žebříčku ATP byl ve dvouhře nejvýše klasifikován v březnu 2019 na 64. místě a ve čtyřhře pak v červenci 2017 na 209. místě. Trénuje ho Andrés Schneiter.
V argentinském daviscupovém týmu neodehrál do listopadu 2019 žádné utkání.