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Looking at this season's data, The Athletic have created a list of keepers with a positive "post-shot expected goals" rating. Or PSxG. It's basically the equivalent of a striker's expected goals (xG) - it gives a goalkeeper a rating based on the number of goals they should concede, given the shots they've faced this season.
And No 1 by far in the ranking is West Brom's Sam Johnstone. The 27-year-old, who frustrated Manchester United for long periods on Saturday, has an overall PSxG of 21. That means he should have conceded 21 goals (excluding own goals) this season - but he's actually let in 17.
So Johnstone's has a +4 rating for conceding four fewer goals - based on the shots he's faced - than he actually has. Hats off.
The man second on the list is the keeper Arsenal sold to Aston Villa in September, Emiliano Martinez. The 28-year-old Argentine has an overall PSxG of 12.5 - but he's only let in 11 goals this season. So his rating is +1.5. A fair way behind Johnstone, but still very impressive.
Only nine goalkeepers in the Premier League this season boast a positive PSxG rating, meaning they are saving more shots than they should be.
That list includes Chelsea's new signing Edouard Mendy, Liverpool's Alisson and Leicester's Kasper Schmeichel. Everton loanee Robin Olsen also has a positive PSxG, but that's only based on the small sample size of one game.
Notably absent on the list are the likes of Manchester United's David de Gea, Manchester City's Ederson and Tottenham's Hugo Lloris, which surprised us.
The list of the nine best shot-stopping keepers and their positive PSxG this season is below. Check out The Athletic's full explanation here.
1. Sam Johnston +4
2. Emiliano Martinez +1.5
3. Edouard Mendy +1
4. Alphonse Areola +0.8
5= Vicente Guaita +0.4
5= Robin Olsen +0.4
5= Kasper Schmeichel +0.4
8. Alisson +0.3
9. Lukasz Fabianski +0.2
All imagery: PA Images
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