Benfica lodged the complaint following an incident in the 80th minute where Valverde swung his arm towards Samuel Dahl's head. While the level of contact was unclear and VAR did not intervene, the Portuguese club has still requested UEFA's review of the incident.
The two teams will meet again next Wednesday with all players involved likely to feature. Real Madrid currently holds a 1-0 advantage on aggregate heading into the second leg at the Santiago Bernabeu.