In this explainer series, we explain the key metrics used in football data analytics. To kick things off we cover how the data movement started and unpack its now-famous Expected Goals metric.

Some of the key themes we'll be covering in this episode:

• Why there was a need to re-evaluate how football analytics is consumed
• What is Expected Goals (xG)
• xG put into practice
• The pros and cons of xG as a data point