17‑Aug‑1970 | Merion | Grass | R64 | | | Butch Seewagen [USA] d. Alvarez | 6-3 6-3 | | | | | | | | | |
27‑Jul‑1970 | Indianapolis | Clay | R64 | | | Frank Froehling [USA] d. Alvarez | 6-4 6-4 | | | | | | | | | |
27‑Jul‑1970 | Indianapolis | Clay | R64 | | | Frank Froehling [USA] d. Alvarez | 6-4 6-4 | | | | | | | | | |
20‑Jul‑1970 | Cincinnati | Clay | R32 | | | (6)Ion Tiriac [ROU] d. Alvarez | 6-2 6-1 | | | | | | | | | |
20‑Jul‑1970 | Cincinnati | Clay | R64 | | | Alvarez d. Tom Gorman [USA] | 6-1 6-4 | | | | | | | | | |
18‑Jul‑1970 | Washington | Hard | R32 | | | Pancho Guzman [ECU] d. Alvarez | 3-6 6-1 6-2 | | | | | | | | | |
18‑Jul‑1970 | Washington | Hard | R64 | | | Alvarez d. Allan Stone [AUS] | 6-4 6-2 | | | | | | | | | |