"Tennis Match Statistics"

"The dataset contains a total of 20,562 data sets. The ball speed of the two players ranges from 98 km\/h to 226 km\/h, with an average ball speed of 166.72 km\/h. As shown in Table 1, the movement distances of the two players are generally similar, but the maximum value of Player 1 is higher than that of Player 2. For serve directions, they are divided into five categories: 1 (body serve), 2 (body\/middle), 3 (body\/crosscourt), 4 (middle), 5 (crosscourt); for the situation of serving close to the boundary line, \"close\" is recorded as 1, and \"not close\" is recorded as 2. Since the latter two variables are categorical variables, their mean and variance are not listed in Table 1."

本数据集总计包含20562条数据。两名运动员的球速区间为98 km/h至226 km/h，平均球速为166.72 km/h。如表1所示，两名运动员的移动距离整体相近，但运动员1的移动距离最大值高于运动员2。发球方向（serve directions）共分为五类：1对应身体位发球（body serve），2对应身体/中路，3对应身体/斜线，4对应中路，5对应斜线；针对发球贴近边线的场景，“贴近”记为1，“不贴近”记为2。由于后两类变量均为分类变量，表1未列出其均值与方差。