Ruben is very influential. Watch the free kick goal again, build up and everything... I'm not sure if he called it for Gundo, but he knew exactly what was going on. He's there with Rodri to block G/K and distract the wall. He was watching Pickford like a hawk, then has a quick talk to Gundo and Mahrez. It's then they make the decision, Gundo tells Mahrez to take a fake run up. Ruben tells Rodri to move away (as he did) to make space for the shot, so he definitely called that angle - it just flew past his head on that side.
Same with Mahrez free kick afterwards, he's watching the GK, and organising the angle, blocking Pickford's view with Alvarez, coaching him how to do it. That was nearly a goal too.