The raw data behind the story "Why Some Tennis Matches Take Forever" https://fivethirtyeight.com/features/why-some-tennis-matches-take-forever/.
A data frame with 205 rows representing tournaments and 5 variables:
Name of event
Court surface used at the event
Seconds added per point for this event on this surface in years shown, from regression model controlling for players, year and other factors
Start year for data used from this tournament in regression
End year for data used from this tournament in regression