A controversial incident in Real Betis v Real Madrid has highlighted one of the limits of the VAR protocol.

Arda Güler, already on a yellow card, escaped further punishment after a late challenge on Marc Roca. The incident raised the question of whether another booking should have been shown.

Under the current VAR protocol, however, VAR cannot intervene simply because the referee may have missed an offence that should have resulted in a second yellow card. That means a potentially decisive mistake can remain uncorrected even when the consequence would have been a sending-off.

Supporters are left with a difficult trade-off. Expanding VAR could correct more match-changing errors, but it would also bring more subjective yellow-card decisions into the review process.

Should this remain the referee's call, or is a second yellow too important for VAR to ignore?