How the four Grand Slams called lines, 2017 to 2026
In 2026, 3 of the 4 Grand Slams called every line electronically.
- Electronic on every court
- Electronic on some courts
- Line judges and challenges
- Line judges only
- No row
Each cell is one tournament in one season. A dash marks a season with no row. Events that were not held have no row.
Show the numbers as a table
Events that were not held have no row. That covers Wimbledon 2020, the other events cancelled in 2020, the events in China from 2020 to 2022, and Wuhan in 2023. Events still to be played after 22 October 2026 are also left out.
| Season | Australian Open | Roland Garros | Wimbledon | US Open |
|---|---|---|---|---|
| 2017 | Line judges and challenges | Line judges only | Line judges and challenges | Line judges and challenges |
| 2018 | Line judges and challenges | Line judges only | Line judges and challenges | Line judges and challenges |
| 2019 | Line judges and challenges | Line judges only | Line judges and challenges | Line judges and challenges |
| 2020 | Line judges and challenges | Line judges only | No row | Electronic on some courts |
| 2021 | Electronic on every court | Line judges only | Line judges and challenges | Electronic on every court |
| 2022 | Electronic on every court | Line judges only | Line judges and challenges | Electronic on every court |
| 2023 | Electronic on every court | Line judges only | Line judges and challenges | Electronic on every court |
| 2024 | Electronic on every court | Line judges only | Line judges and challenges | Electronic on every court |
| 2025 | Electronic on every court | Line judges only | Electronic on every court | Electronic on every court |
| 2026 | Electronic on every court | Line judges only | Electronic on every court | Electronic on every court |
Source: Live Tennis API, tennis line-calling dataset. CC BY 4.0. Version 1.0.1, data to 22 October 2026.