Every row of the line-calling dataset by season, 2017 to 2026

In 2026, 36 of 38 rows record electronic calling on every court. In 2017 it was 1 of 25.

010203040502017: Electronic on every court, 1 of 25 rows2017: Line judges and challenges, 18 of 25 rows2017: Line judges only, 5 of 25 rows2017: No trusted source, 1 of 25 rows20172018: Electronic on every court, 1 of 25 rows2018: Line judges and challenges, 18 of 25 rows2018: Line judges only, 6 of 25 rows20182019: Electronic on every court, 1 of 26 rows2019: Line judges and challenges, 18 of 26 rows2019: Line judges only, 5 of 26 rows2019: No trusted source, 2 of 26 rows20192020: Electronic on every court, 3 of 11 rows2020: Electronic on some courts, 1 of 11 rows2020: Line judges and challenges, 2 of 11 rows2020: Line judges only, 1 of 11 rows2020: No trusted source, 4 of 11 rows20202021: Electronic on every court, 11 of 25 rows2021: Line judges and challenges, 3 of 25 rows2021: Line judges only, 2 of 25 rows2021: No trusted source, 9 of 25 rows20212022: Electronic on every court, 7 of 26 rows2022: Line judges and challenges, 1 of 26 rows2022: Line judges only, 2 of 26 rows2022: No trusted source, 16 of 26 rows20222023: Electronic on every court, 5 of 28 rows2023: Line judges and challenges, 1 of 28 rows2023: Line judges only, 2 of 28 rows2023: No trusted source, 20 of 28 rows20232024: Electronic on every court, 10 of 29 rows2024: Line judges and challenges, 3 of 29 rows2024: Line judges only, 3 of 29 rows2024: No trusted source, 13 of 29 rows20242025: Electronic on every court, 32 of 45 rows2025: Line judges only, 1 of 45 rows2025: No trusted source, 12 of 45 rows20252026: Electronic on every court, 36 of 38 rows2026: Line judges only, 1 of 38 rows2026: No trusted source, 1 of 38 rows2026010203040502017: Electronic on every court, 1 of 25 rows2017: Line judges and challenges, 18 of 25 rows2017: Line judges only, 5 of 25 rows2017: No trusted source, 1 of 25 rows'172018: Electronic on every court, 1 of 25 rows2018: Line judges and challenges, 18 of 25 rows2018: Line judges only, 6 of 25 rows'182019: Electronic on every court, 1 of 26 rows2019: Line judges and challenges, 18 of 26 rows2019: Line judges only, 5 of 26 rows2019: No trusted source, 2 of 26 rows'192020: Electronic on every court, 3 of 11 rows2020: Electronic on some courts, 1 of 11 rows2020: Line judges and challenges, 2 of 11 rows2020: Line judges only, 1 of 11 rows2020: No trusted source, 4 of 11 rows'202021: Electronic on every court, 11 of 25 rows2021: Line judges and challenges, 3 of 25 rows2021: Line judges only, 2 of 25 rows2021: No trusted source, 9 of 25 rows'212022: Electronic on every court, 7 of 26 rows2022: Line judges and challenges, 1 of 26 rows2022: Line judges only, 2 of 26 rows2022: No trusted source, 16 of 26 rows'222023: Electronic on every court, 5 of 28 rows2023: Line judges and challenges, 1 of 28 rows2023: Line judges only, 2 of 28 rows2023: No trusted source, 20 of 28 rows'232024: Electronic on every court, 10 of 29 rows2024: Line judges and challenges, 3 of 29 rows2024: Line judges only, 3 of 29 rows2024: No trusted source, 13 of 29 rows'242025: Electronic on every court, 32 of 45 rows2025: Line judges only, 1 of 45 rows2025: No trusted source, 12 of 45 rows'252026: Electronic on every court, 36 of 38 rows2026: Line judges only, 1 of 38 rows2026: No trusted source, 1 of 38 rows'26

Each row is one event in one season for one tour. An event with an ATP and a WTA draw has a row for each, and a Grand Slam has one combined row. 78 of the 278 rows have no trusted source and are drawn as their own group.

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.

Rows by season
SeasonElectronic on every courtElectronic on some courtsLine judges and challengesLine judges onlyNo trusted sourceAll rows
201710185125
201810186025
201910185226
20203121411
202111032925
202270121626
202350122028
2024100331329
2025320011245
202636001138

Source: Live Tennis API, tennis line-calling dataset. CC BY 4.0. Version 1.0.1, data to 22 October 2026.