Chelsea's starting XI against West Brom raised some eyebrows.
That is not due to any twist in Frank Lampard's tactics but due to the inclusion of Andreas Christensen, who was sent off in last week's defeat to Liverpool.
Christensen had only picked up a yellow after hauling down Sadio Mane but that was upgraded to a red card after the referee consulted a pitchside monitor for VAR purposes.
That had left many thinking Christensen would be unavailable to play West Brom due to the red card.
Yet the defender actually served his suspension in the midweek Carabao Cup victory over Barnsley.
Red cards are no longer competition-specific since a rule change at the start of last season.
That means, if a player is sent off, they will serve their suspension in their team's next immediate first-team game.
It meant that Christensen was replaced by Fikayo Tomori for the 6-0 demolition of Championship side Barnsley and can return to the starting XI for this evening's game against West Brom.
Instead, it is just yellow cards that are competition-specific, meaning an accumulation of bookings would only count for the competition they are picked up in.
The FA's rules state that competitions that suspensions apply to are the 'relevant league in which your club competes, the FA Cup or EFL Cup.'
With suspensions starting immediately unless they are subject to an appeal, it meant Christensen was able to sit out the tie against Barnsley in the knowledge he could feature against West Brom.
