UPDATE: Kramer was subbed out of the game after taking a shot to the head and playing for 10 more minutes. Andre Schürrle took his place on the pitch.
Germany have suffered a big blow just minutes before the World Cup final, with star midfielder Sami Khedira picking up a late calf problem.
He's been ruled out of the match, and replaced in the starting lineup by 23-year-old Christoph Kramer, who was only included in their squad as a backup. Now, he's thrust into the biggest game of his entire career.