11‑Nov‑1968 | Barcelona Nationals | Clay | QF | | | Juan Gisbert [ESP] d. Arilla | 8-6 6-4 6-2 | | | | | | | | | |
11‑Nov‑1968 | Barcelona Nationals | Clay | R16 | | | Arilla d. Sixto Cambra [ESP] | W/O | | | | | | | | | |
11‑Nov‑1968 | Barcelona Nationals | Clay | R32 | | | Arilla d. Luiz Flor [UNK] | W/O | | | | | | | | | |
1‑Oct‑1968 | Madrid Real | | QF | | | Manuel Santana [ESP] d. Arilla | 6-3 6-1 | | | | | | | | | |
1‑Oct‑1968 | Madrid Real | | R16 | | | Arilla d. Antonio Solana [ESP] | 6-1 6-0 | | | | | | | | | |
1‑Oct‑1968 | Madrid Real | | R32 | | | Arilla d. Follder [] | 6-0 6-1 | | | | | | | | | |
25‑Jul‑1968 | La Coruna | Clay | QF | | | Herb Fitzgibbon [USA] d. Arilla | 5-7 6-1 6-4 | | | | | | | | | |
25‑Jul‑1968 | La Coruna | Clay | R16 | | | Arilla d. Pancho Guzman [ECU] | 6-2 6-2 | | | | | | | | | |
8‑Jul‑1968 | Bastad 1 | Clay | QF | | | Ion Tiriac [ROU] d. Arilla | 6-4 6-4 6-1 | | | | | | | | | |
8‑Jul‑1968 | Bastad 1 | Clay | R16 | | | Arilla d. Clark Graebner [USA] | 6-2 6-0 6-3 | | | | | | | | | |
8‑Jul‑1968 | Bastad 1 | Clay | R32 | | | Arilla d. Hans Nerell [SWE] | 6-2 7-5 5-7 0-6 6-2 | | | | | | | | | |
24‑Jun‑1968 | Wimbledon | Grass | R64 | | | Ove Bengtson [SWE] d. Arilla | 6-0 5-7 6-4 6-3 12-10 | | | | | | | | | |
24‑Jun‑1968 | Wimbledon | Grass | R128 | | | Arilla d. Keith Carpenter [CAN] | 6-4 6-4 11-13 6-3 | | | | | | | | | |
7‑Jun‑1968 | Barcelona | Clay | QF | | | (1)Martin Mulligan [AUS] d. (8)Arilla | 3-6 7-5 6-4 6-0 | | | | | | | | | |
7‑Jun‑1968 | Barcelona | Clay | R16 | | | (8)Arilla d. Jaidip Mukerjea [IND] | 6-2 6-3 6-8 6-2 | | | | | | | | | |
7‑Jun‑1968 | Barcelona | Clay | R32 | | | (8)Arilla d. Enrique Guerrero [ECU] | 6-1 6-2 6-1 | | | | | | | | | |
7‑Jun‑1968 | Barcelona | Clay | R64 | | | (8)Arilla d. Jose L Asensio [UNK] | 6-2 6-0 6-2 | | | | | | | | | |
6‑May‑1968 | Rome | Clay | R128 | | | Massimo Di Domenico [ITA] d. Arilla | 6-2 6-4 6-4 | | | | | | | | | |
15‑Apr‑1968 | Madrid | Clay | R16 | | | Carlos Fernandes [BRA] d. Arilla | 9-7 6-2 | | | | | | | | | |
15‑Apr‑1968 | Madrid | Clay | R32 | | | Arilla d. J Alonso [ESP] | 6-2 6-2 | | | | | | | | | |
25‑Mar‑1968 | New York 1 | Carpet | R32 | | | Ingo Buding [GER] d. Arilla | 6-1 6-1 | | | | | | | | | |
18‑Mar‑1968 | Mexico City | | QF | | | Patricio Rodriguez Chi [CHI] d. Arilla | 6-1 1-6 7-5 | | | | | | | | | |
18‑Mar‑1968 | Mexico City | | R16 | | | Arilla d. Federico Cervantes [MEX] | 6-1 6-4 | | | | | | | | | |
18‑Mar‑1968 | Mexico City | | R32 | | | Arilla d. Esteban Reyes [MEX] | 6-1 6-2 | | | | | | | | | |
11‑Mar‑1968 | Caracas | Hard | R16 | | | Jan Kukal [CZE] d. Arilla | 11-9 6-0 | | | | | | | | | |
11‑Mar‑1968 | Caracas | Hard | R32 | | | Arilla d. Jim Mcmanus [USA] | 2-6 6-3 9-7 | | | | | | | | | |
4‑Mar‑1968 | Barranquilla | Clay | R32 | | | Jan Kodes [CZE] d. Arilla | 6-3 6-1 | | | | | | | | | |
26‑Feb‑1968 | Kingston | Hard | QF | | | Tom Okker [NED] d. Arilla | 6-4 6-4 | | | | | | | | | |
26‑Feb‑1968 | Kingston | Hard | R16 | | | Arilla d. Zeljko Franulovic [CRO] | 10-8 6-4 | | | | | | | | | |
20‑Feb‑1968 | Macon | Hard | R16 | | | (5)Jan Leschly [DEN] d. Arilla | 6-4 6-2 | | | | | | | | | |
20‑Feb‑1968 | Macon | Hard | R32 | | | Arilla d. Bailey Brown [USA] | 6-4 6-4 | | | | | | | | | |
12‑Feb‑1968 | Salisbury | Hard | R32 | | | Mike Estep [USA] d. Arilla | 6-3 7-5 | | | | | | | | | |
12‑Feb‑1968 | Salisbury | Hard | R64 | | | Arilla d. F D Robbins [USA] | 6-0 8-6 | | | | | | | | | |