Head to head
Rivalry summary
John Penero and Jack Adolphson met 1 times on the ATP tour between 1968 and 1968. Jack Adolphson leads the head-to-head 1–0 against John Penero.
0
Hard
1
John Penero's wins on the left · Jack Adolphson's on the right · bar lengths share one scale
All meetings (1)
| 1968 | Sacramento | Hard | R64 | Jack Adolphson | 8-6 6-0 |
Methodology
Head-to-head totals and surface splits exclude walkovers (no match was played), which follows ATP convention — walkover meetings still appear in the match list. The momentum chart plots the running lead across all counted meetings, oldest to newest.