(CNN) -- Four days after Neymar was kneed in the back, Brazil face the real possibility of being booted out of their own World Cup when they take on Germany in the semifinal at Belo Horizonte on Tuesday. The hosts will have to manage without their star striker after he sustained a fractured vertebra in the 2-1 quarterfinal win over Colombia in Fortaleza. It's not just in attack that Brazil have problems -- captain and key defender Thiago Silva is suspended after picking up his second yellow card of the tournament in the same match, and an appeal was rejected by FIFA.
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Hosts Brazil face Germany in World Cup semifinal on Tuesday
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Brazil without injured Neymar and suspended captain Thiago Silva
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Germany come into match following 1-0 over France in quarterfinals
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Mexican referee who missed Luis Suarez bite earlier in tournament to officiate match
Wild celebrations following Friday's win became more muted when news filtered through that Neymar -- scorer of four goals in five matches in @placeholder's campaign -- would play no further part in the tournament.