An explanation has been provided for why Diogo Dalot did not receive a red card for his challenge on Jeremy Doku in the first half of Saturday's derby between Manchester United and Manchester City . Dalot was booked for catching Doku with a high boot on the knee. VAR checked the challenge after on-field referee Anthony Taylor issued a yellow card to Dalot. But Taylor's original decision stood after VAR officials investigated the incident. The yellow card decision stood, as VAR did not think