11‑Dec‑2023 | M15 Concepcion | Clay | R32 | 1219 | 867 | Diego Fernandez Flores [CHI] d. Loureiro | 6-4 6-3 | | | | | | | | | |
4‑Dec‑2023 | M15 Concepcion | Clay | R32 | 1076 | | (4)Lautaro Midon [ARG] d. Loureiro | 6-3 6-2 | | | | | | | | | |
27‑Nov‑2023 | M15 Santa Cruz | Clay | R32 | 996 | 601 | (8)Guido Ivan Justo [ARG] d. Loureiro | 6-1 6-3 | | | | | | | | | |
13‑Nov‑2023 | M15 Cochabamba | Clay | QF | 1025 | 499 | (1)Ignacio Monzon [ARG] d. Loureiro | 6-1 3-6 6-3 | | | | | | | | | |
13‑Nov‑2023 | M15 Cochabamba | Clay | R16 | 1025 | 1258 | Loureiro d. Alberto Odiseo Alvarado Berrospi [PER] | 6-2 7-6(3) | | | | | | | | | |
13‑Nov‑2023 | M15 Cochabamba | Clay | R32 | 1025 | 785 | Loureiro d. (8)Alan Fernando Rubio Fierros [MEX] | 3-6 6-4 6-3 | | | | | | | | | |
30‑Oct‑2023 | M15 Villa Maria | Clay | R32 | 1035 | 715 | Leonardo Aboian [ARG] d. Loureiro | 6-1 6-0 | | | | | | | | | |
18‑Sep‑2023 | M15 Punta del Este | Clay | R32 | 973 | 613 | (3)Bruno Kuzuhara [USA] d. Loureiro | 6-3 6-2 | | | | | | | | | |
11‑Sep‑2023 | Santa Cruz De La Sierra CH | Clay | Q1 | 969 | 744 | (12)Marcelo Zormann Da Silva [BRA] d. Loureiro | 6-3 6-4 | | 0.40 | 6.3% | 4.7% | 59.4% | 65.8% | 42.3% | 5/7 | 1:19 |
4‑Sep‑2023 | M15 Olavarria | Clay | R32 | 925 | 800 | (7)Matias Zukas [ARG] d. Loureiro | 3-6 6-4 6-4 | | | | | | | | | |
28‑Aug‑2023 | M15 Buenos Aires | Clay | R32 | 925 | | (Q)Joaquin Aguilar Cardozo [URU] d. Loureiro | 7-6(5) 6-4 | | | | | | | | | |
21‑Aug‑2023 | M15 Sao Paulo | Clay | R32 | 873 | 993 | Joao Eduardo Schiessl [BRA] d. (7)Loureiro | 6-1 6-4 | | | | | | | | | |
3‑Jul‑2023 | Santa Fe CH | Clay | R32 | 813 | 191 | (1)Mariano Navone [ARG] d. Loureiro | 6-2 6-4 | | 0.69 | 1.4% | 8.2% | 63.0% | 58.7% | 37.0% | 3/7 | 1:36 |
26‑Jun‑2023 | Medellin CH | Clay | Q1 | 800 | | Keenan Mayo [USA] d. (10)Loureiro | 6-4 6-4 | | 0.86 | 11.7% | 10.0% | 60.0% | 75.0% | 45.8% | 4/7 | 1:21 |
12‑Jun‑2023 | M15 Duffel | Clay | R32 | 789 | 512 | (2)Constantin Bittoun Kouzmine [FRA] d. Loureiro | 6-3 6-2 | | | | | | | | | |
5‑Jun‑2023 | M15 Nyiregyhaza | Clay | R32 | 805 | 760 | Tadeas Paroulek [CZE] d. Loureiro | 5-7 6-4 6-4 | | | | | | | | | |
29‑May‑2023 | M15 Constanta | Clay | R32 | 805 | 710 | (8)Olaf Pieczkowski [POL] d. Loureiro | 6-4 1-6 6-4 | | | | | | | | | |
22‑May‑2023 | M15 Kursumlijska Banja | Clay | R32 | 799 | 801 | Boris Butulija [SRB] d. Loureiro | 7-6(2) 6-4 | | | | | | | | | |
1‑May‑2023 | Coquimbo CH | Clay | Q2 | 826 | 476 | (1)Ignacio Monzon [ARG] d. (10)Loureiro | 2-6 7-6(7) 6-4 | | 0.96 | 4.0% | 4.0% | 50.5% | 70.0% | 49.0% | 3/6 | 2:36 |
24‑Apr‑2023 | M15 Mogi das Cruzes | Clay | QF | 826 | 465 | (1)Orlando Luz [BRA] d. (6)Loureiro | 7-6(5) 7-6(1) | | | | | | | | | |
24‑Apr‑2023 | M15 Mogi das Cruzes | Clay | R16 | 826 | 1317 | (6)Loureiro d. Felipe De Dios [ARG] | 6-4 6-2 | | | | | | | | | |
24‑Apr‑2023 | M15 Mogi das Cruzes | Clay | R32 | 826 | 1803 | (6)Loureiro d. Pedro Rodrigues [BRA] | 3-6 6-3 7-6(3) | | | | | | | | | |
17‑Apr‑2023 | Florianopolis CH | Clay | Q1 | 822 | 767 | (11)Ignacio Carou [URU] d. Loureiro | 7-6(5) 7-5 | | 0.82 | 5.7% | 3.4% | 71.3% | 62.9% | 56.0% | 4/6 | 2:11 |
10‑Apr‑2023 | M15 Santo Domingo de los Tsachilas | Clay | R16 | 820 | 1010 | Tobias Franco [ARG] d. Loureiro | 6-2 6-4 | | | | | | | | | |
10‑Apr‑2023 | M15 Santo Domingo de los Tsachilas | Clay | R32 | 820 | 552 | Loureiro d. (5)Andres Andrade [ECU] | 6-1 3-6 6-4 | | | | | | | | | |
3‑Apr‑2023 | M15 Santo Domingo de los Tsachilas | Clay | R32 | 821 | 552 | (5)Andres Andrade [ECU] d. Loureiro | 6-4 3-6 6-4 | | | | | | | | | |
20‑Feb‑2023 | M25 Santo Domingo | Hard | R32 | 813 | 587 | Conner Huertas Del Pino [PER] d. Loureiro | 6-4 6-4 | | | | | | | | | |
13‑Feb‑2023 | M25 Santo Domingo | Hard | R32 | 813 | 1227 | (LL)Mateo Barreiros Reyes [BRA] d. Loureiro | 6-3 6-4 | | | | | | | | | |