The Stats Perform Goalkeeper Index, however, builds on the xGOT model, personalising the estimates to each keeper and simulating how they would perform over the exact same sample of shots.
On top of the start and end location of shots, the index considers a keeper's historic ability to make saves based on factors including shot destination (left, middle or right of the goal) and the angle to the shot trajectory (straight at them, to the left or to the right).
