Mohamed Salah suffered an injury off a tackle in the 31st minute, and left the stadium in tears.
Minutes later, Real Madrid's Dani Carvajal left in tears, too.
Liverpool goalkeeper Loris Karius attempted to pass an innocuous ball collected by him to a team-mate nearby, but instead allowed Karim Benzema a touch. It went in, and Real Madrid took the lead.
Sadio Mane made the most of a corner melee to level for Liverpool.
Gareth Bale, minutes after coming in as a substitute, stunned onlookers with a spectacular bicycle kick.
Karius mishandled a ball once again; Bale's shot from a distance burst through his hands and into the goal.
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