As the first half against Liverpool drew to a close, Brazilian winger Vinícius Jr was convinced Real Madrid should have been given a penalty.
He had broken into a dangerous one-on-one situation with Liverpool full-back Conor Bradley inside the box, but despite going to ground dramatically, the referee dismissed his protests and refused to award a spot-kick.
Vinícius Jr endured a disappointing opening 45 minutes, making little impact and contributing neither a goal nor an assist.
As both sides prepared to emerge for the second half, it was evident that the Brazilian would need to raise his level considerably if Real Madrid hoped to mount a comeback against the determined Reds.