diff_stats: Statistic Differences of ATP Matches
In skoval/WOMBATsport: Datasets for tutorial at 2017 WOMBAT data science conference

This dataset contains difference statistics for 2016 ATP matches. Each differential is based on the average of the previous 30 matches up to but not including the current match. The variables of the dataset are:

A data frame with 1,502 rows and 20 variables

matchid. A character identifying match
tourney_name. A character tournament name
surface. A character description of the court surface (Carpet, Clay, Grass, or Hard)
player1. A character of the name of player 1
player2. A character of the name of player 2
tourney_date. A Date object of the tournament date
round. A factor of the round
winner. An integer indicating whether player1 was the winner = 1 or loser = 0 of the match
diff_ace_rate. A numeric that is the difference in rate of aces between player 1 and player2.
diff_df_rate. A numeric that is the difference in rate of double faults between player 1 and player2.
diff_first_serve_in_p. A numeric that is the difference in first serve proportion in between player 1 and player2.
diff_first_serve_won_p. A numeric that is the difference in proportion of first service points won between player 1 and player2.
diff_second_serve_won_p. A numeric that is the difference proportion of second service points won between player 1 and player2.
diff_serve_won_p. A numeric that is the difference in proportion service points won player 1 and player2.
diff_first_return_won_p. A numeric that is the difference in proportion of first return points won between player 1 and player2.
diff_second_return_won_p. A numeric that is the difference in proportion of second return points won between player 1 and player2.
diff_return_won_p. A numeric that is the difference in proportion of return points won between player 1 and player2.
diff_total_won_p. A numeric that is the difference in proportion of total points won between player 1 and player2.
diff_bp. A numeric that is the difference in break points won between player 1 and player2.
diff_bp_opp. A numeric that is the difference in break point opportunities between player 1 and player2.