2‑Sep‑2019 | M15 Sao Bras Alportel | Hard | R32 | 1606 | 877 | Julius Tverijonas [LTU] d. Griffith | 6-4 7-5 | | | | | | | | | |
26‑Aug‑2019 | M15 Piombino | Hard | R16 | 1606 | 789 | Walter Trusendi [ITA] d. (Q)Griffith | 6-2 6-4 | | | | | | | | | |
26‑Aug‑2019 | M15 Piombino | Hard | R32 | 1606 | 1383 | (Q)Griffith d. Francesco Bessire [ITA] | 6-3 7-6(2) | | | | | | | | | |
8‑Jul‑2019 | M15 Idanha a Nova | Hard | R16 | 667 | | Francisco Dias [POR] d. Griffith | 4-6 7-6(5) 7-6(1) | | | | | | | | | |
8‑Jul‑2019 | M15 Idanha a Nova | Hard | R32 | 667 | | Griffith d. (WC)Afonso Salgado [POR] | 6-2 6-2 | | | | | | | | | |
1‑Jul‑2019 | M15 Idanha a Nova | Hard | R32 | 667 | | Juan Carlos Manuel Aguilar [BOL] d. (4)Griffith | 6-4 6-2 | | | | | | | | | |
3‑Jun‑2019 | M25 Hong Kong | Hard | R32 | 649 | | Aaron Addison [AUS] d. Griffith | 6-2 6-3 | | | | | | | | | |
27‑May‑2019 | M25 Nonthaburi | Hard | R32 | 649 | | Anton Chekhov [RUS] d. Griffith | 2-6 6-3 6-4 | | | | | | | | | |
20‑May‑2019 | M25 Nonthaburi | Hard | R32 | 651 | 566 | Rio Noguchi [JPN] d. Griffith | 7-5 6-2 | | | | | | | | | |
22‑Apr‑2019 | M15 Cancun | Hard | R32 | 655 | | Yshai Oliel [ISR] d. Griffith | 7-6(3) 6-4 | | | | | | | | | |
8‑Apr‑2019 | M25 Sunderland | Hard | R16 | 643 | 423 | Igor Sijsling [NED] d. Griffith | 6-4 6-2 | | | | | | | | | |
8‑Apr‑2019 | M25 Sunderland | Hard | R32 | 643 | | Griffith d. (Q)Scott Duncan [GBR] | 7-5 7-6(5) | | | | | | | | | |
1‑Apr‑2019 | M25 Bolton | Hard | R32 | 640 | 396 | (6)Julian Lenz [GER] d. Griffith | 6-0 7-5 | | | | | | | | | |
11‑Feb‑2019 | M15 Tucson AZ | Hard | R32 | 640 | | (JR )Liam Draxl [CAN] d. Griffith | 6-3 6-2 | | | | | | | | | |
4‑Feb‑2019 | M15 Claremont CA | Hard | R32 | 643 | 625 | Nick Chappell [USA] d. Griffith | 7-6(1) 7-5 | | | | | | | | | |