- Oct 21, 2020
A lower xGA means goalkeeper B had the easier job. Saving 60% of easy shots isn’t as good as saving 50% of difficult shots.But say Goalkeeper A is expected to concede 20 and concedes 10, giving him a score of +10. Meanwhile Goalkeeper B is expected to concede 10 and concedes 4, giving him a score of +6.
On face value Goalkeeper A has outperformed Goalkeeper B by +4. But in reality Goalkeeper B has prevented 60% of the xG he faced compared to Goalkeeper A's 50%, so is in fact performing better relative to the goal threat he's facing.
So what am I missing in terms of how the stats adjust for the differing levels of opportunity to prevent goals?
Edit: just to be clear I'm not saying you're wrong, I'm just wondering what's throwing me.