Pitch-side tests to assess players like Arsenal's David Luiz are too 'superficial' to know if a player actually has a serious head injury, according to a leading brain surgeon ...

Pitch-side tests to assess players like Arsenal's David Luiz are too 'superficial' to know if a player actually has a serious head injury, according to a leading brain surgeon ....

The pitch-side assessments of footballers who have suffered a head injury are too 'quick' and 'cursory' to determine if a player is really hurt, a leading brain surgeon told Sportsmail.

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