Damir Skomina, who refereed England's 2-1 defeat to Iceland, will be in charge of the Wales v Belgium Euro 2016 quarter-final on Friday.
The Slovenian, widely acclaimed for his performance in Nice on Monday evening, is supported by assistants Jure Praprotnik and Robert Vukan at the Grand Stade Metropole in Lille.
Compatriots Matej Jug and Slavko Vincic have been named as his additional assistants.
Felix Brych of Germany will take charge of Thursday's quarter-final between Portugal and Poland at the Stade Veldrome in Marseille but the competition is over for English official Martin Atkinson.
The Bradford-born referee, in charge of Wales' 1-0 victory over Northern Ireland last weekend, has returned home along with Spaniard Velasco Carvallo and Turkey's Cuneyt Cakir.
The appointments for the other two quarter-finals will be announced over the next 24 hours.