This graphic highlights teams in the Premier League for 2018-19 and how well they pressed. So, on the bottom we have PPDA (passes per defensive action). This merely refers to how much a team pressed. The lesser the number the more a team pressed. On the left we have success rate which illustrates the percentage of times a team won the ball back from pressing. Thus, the top right-hand corner of the graphic holds the best teams whereas the bottom left-hand corner holds the worse teams.