"Pedro stayed in hospital overnight in Beijing for observation having sustained a concussion and facial injuries in last night's game against Arsenal," the club said in a statement on their website on Sunday.
"He will now return to London for further review."
The league champions will face German champions Bayern Munich in their next pre-season match in Singapore on Tuesday.
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(Reporting by Aditi Prakash in Bengaluru; Editing by Toby Davis)
