Players suffering suspected concussion will have to be cleared by team doctors, under new FIFA proposals.
Christoph Kramer will see out his loan spell at Borussia Monchengladbach and then return to Bayer Leverkusen.
Joachim Low has trimmed Germany's World Cup squad to 27, but has drafted in Borussia Monchengladbach's Christoph Kramer.
Benfica could be ready to swoop for Partizan Belgrade starlet Lazar Markovic, who had looked set for a move to Chelsea.
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