Expected Assists
xA
模型估计某次传球（或关键动作）在历史数据中成为助攻的频率。
短标签已本地化。完整定义段落为准确性保留英文。
定义
Expected assists (xA) scores chance creation quality before the shot. Definitions vary: some models score the pass that leads to a shot; others include key passes more broadly.
Like xG, xA is strongest over samples and weakest as a single-action moral verdict. It complements shot quality rather than replacing match context.
注意
高 xA 但射门未转化仍需录像与比赛状态阅读。模型范围很重要。