The 29-year-old Spaniard was left reeling on the ground with a bloodied face inside the first half hour of the game after Colombian keeper David Ospina flew into him while clearing a long-ball with two fists.

After receiving medical attention on the pitch for several minutes, Pedro got up and walked off with blood in his nose, lips and right ear.

"For sure (he) should be okay but I think he had a concussion," Chelsea manager Antonio Conte told reporters after a Michy Batshuayi double sparked his side to an easy victory.

"For this reason our doctor preferred to bring him to the hospital and to check him in the right way," the Italian added.

"It's a pity because in this period now it's not good to have this type of injury, but should be okay and I'm very happy for this."

Conte said he did not know whether Pedro would have to spend the night in hospital, but if the Spaniard is better on Sunday he will travel with the team to Singapore to continue the preseason.

The injury scare overshadowed a brilliant performance by Belgian forward Batshuayi before a crowd of 55,618 at the Bird's Nest in the Chinese capital.