Looking at the ongoing 2020-21 Premier League season, The Athletic have created a list of goalkeepers with a positive shot-stopping rating.
They have termed it as PSxG, basically means the same as a striker's expected goals (xG), but for goalkeepers in terms of saving. It gives a goalkeeper a rating depending on the amount of goals they should concede in comparison to the number of shots they have faced this season.
And top of the rankings in the Premier League is Sam Johnstone, who has an overall PSxG of 21. That implies he should have actually conceded 21 goals (excluding own goals) this season - but he's actually managed to save four of them and let in just 17, which shows him as a +4 rating.
Second on the list is Aston Villa star Emiliano Martinez. The 28-year-old has an overall PSxG of 12.5 - but he's only conceded 11 goals this season. Thus, his rating is +1.5.
Here's the full list of top 5 with it being a tie for the fifth spot among two players.....
1. Sam Johnstone +4 - West Bromwich Albion
2. Emiliano Martinez +1.5 - Aston Villa
3. Edouard Mendy +1 - Chelsea
4. Alphonse Areola +0.8 - Fulham
5= Vicente Guaita +0.4 - Crystal Palace
5= Kasper Schmeichel +0.4 - Leicester City