Despite displacing Petr Cech as the Chelsea No 1 to be a mainstay in the Blues' title win less than 18 months ago, Thibaut Courtois has become statistically the worst goalkeeper in the Premier League.
A promising start to the season under Antonio Conte has disappeared after successive defeats by Liverpool and Arsenal, and this latest development will give the Italian plenty of food for thought.
The 24-year-old has a save percentage of 47.1 so far this season, meaning he is letting more opposition shots hit the back of his net than not.
The man whose place he took in the Chelsea starting lineup finds himself eighth in the league table, with a more than respectable save percentage of 70.