# John Marks vs Terry Ryan — Head-to-Head

Source: https://tennis-db.com/rivalries/john-marks-vs-terry-ryan?player1_id=4580029&player2_id=sackmann_atp:111136
Tour: ATP

John Marks holds a 1–0 lead over Terry Ryan in their ATP head-to-head. Across 1 main-draw meeting, John Marks leads 1–0 on clay. Most recently, John Marks won the 1976 North Conway round of 64 6-2 6-4.

Category presentation: Arrows show an edition's recorded category and documented modern equivalent; unresolved editions keep their recorded category.
Details: https://tennis-db.com/glossary#category-equivalence

Category presentation: Asterisked totals include editions mapped from documented historical predecessor categories.
Details: https://tennis-db.com/glossary#category-equivalence

## Overall
- John Marks: 1 wins
- Terry Ryan: 0 wins
- Total meetings: 1

## By surface
- Clay: John Marks 1 - 0 Terry Ryan

## By tournament category
- ATP 250: John Marks 1 - 0 Terry Ryan

## Advanced statistics comparison
Career aggregates from the precomputed Advanced table. Surface Elo values are relative to overall Elo; career Schedule is normalized per 100 matches and lower means tougher opposition.

| Player | Peak Elo | P+ | Serve+ | Return+ | PD | TPW% | Hard Elo | Clay Elo | Grass Elo | Set Win% | Set Margin | Dec. Set | Tiebreak | Pressure+ | Schedule |
| :--- | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: |
| John Marks | 1632 | 116.6 | - | - | - | - | -59 | -11 | 67 | 30.7% | -1.37 | 14-15 (48%) | 8-18 (31%) | 101.0 | 3.06 |
| Terry Ryan | 1500 | 96.4 | - | - | - | - | - | - | - | 22.4% | -1.99 | 3-5 (38%) | 4-3 (57%) | - | 5.5 |

## Recent meetings (last 10)
| Date | Tournament | Category | Round | Surface | Winner | Score |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1976-08-10* | North Conway | ATP 250 | R64 | Clay | John Marks | 6-2 6-4 |

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Canonical URL: https://tennis-db.com/rivalries/john-marks-vs-terry-ryan?player1_id=4580029&player2_id=sackmann_atp:111136
Data source: TennisDB (tennis-db.com)