JUST IN: The four Nottingham Forest stars who are at risk of Premier League suspension as yellow cards rule explained below…

Their only defeat, a home game against Fulham in which an error from Nuno was to blame, was followed up by a valuable point on the road away at in-form Chelsea.

Several Nottingham Forest stars have been in excellent form, but one thing they can’t afford is ill-discipline.

Morgan Gibbs-White has already received one red card this season, as has James Ward-Prowse, and 15 Forest first-teamers have been given yellow cards.

Neco Williams ranks highest with three to his name, while Ibrahim Sangare, Matz Sels, and Ryan Yates all have two.

Those four in particular will need to be cautious over the coming or face the frustration of a one-match suspension.

The Premier League’s yellow card rule explained

As everybody knows, footballers can be brandished yellow and red cards.

A yellow is usually given to caution a player for anything ranging from dissent to a poor tackle.

Players given a yellow card can continue playing but if they are cautioned a second time, they are brandished a second yellow, that can be upgraded to a red.

If the foul committed is severe, a straight red card will be issued and can still be issued if a player is already on a yellow as opposed to two yellow cards.

Because of this, many players pick up multiple yellow cards throughout the season, but there is a limit.

Players who collect five yellow cards receive an automatic one-match suspension.

This only applies to league games, meaning that should a Carabao Cup or FA Cup fixture fall in between a league game, the player in question would be able to play.

If a player picks up 10 yellow cards, a two-match suspension would be handed out.

In even more unlikely circumstances, 15 yellow cards would result in a three-match suspension and 20 could result in a misconduct charge from the FA.