The VAR system worked and worked well with the decision to overturn Victor Lindelof's red card.
Referee Martin Atkinson and his assistant Steve Child had a quick consultation following Lindelof's challenge on Diogo Jota which happened right under the assistant's nose.
After their conversation Martin concluded the tackle by the United defender was out of control and therefore produced the red card - which would have been absolutely right in that situation.
Red cards are automatically checked by the VAR - and the upshot of that review was that the tackle was deemed to be reckless rather than out of control.
And the punishment for that is a yellow card.
So this was definitely a case of VAR working well and getting the right decision.