Salah set up Tarek Hamed's opener in the Africa Cup of Nations qualifier, before netting his country's third goal with a well-worked move in the 20th minute.
The Liverpool forward was then withdrawn from the contest in minute 75, as the result took Egypt top of Group D in qualifying after four fixtures.
Later on in the day, Robertson captained Scotland to a 2-0 triumph over Spain at Hampden Park in the qualifying stages for Euro 2024.
The left-back also assisted Scott McTominay's opening goal at Hampden Park to help Steve Clarke's side make it two wins from two in their group.
Meanwhile, Curtis Jones and Harvey Elliott were both involved in England U21s' 2-1 defeat to Croatia in a friendly.