Beijing, July 22 (AFP): Chelsea crushed Arsenal 3-0 in a preseason game in Beijing on Saturday but the friendly turned ugly as Pedro left the field with a bloodied face after a big collision with David Ospina. The injury scare was followed by a two-goal performance by Chelsea's Belgian forward Michy Batshuayi before a crowd of 55,618 people at the Bird's Nest in the Chinese capital. Pedro lay on the ground within half an hour with blood in his nose, lips and right ear after colliding with Colombian keeper Ospina, who slammed into the Spaniard as he leapt to clear a long ball with both fists. After a few minutes of medical attention on the ground, the Spanish international walked off the pitch and did not return to the game. Arsenal's star signing, Alexandre Lacazette, had a low-key first half and did not return for the second period. Willian opened the score sheet from just inside the area in the 40th minute, taking a low shot with an Arsenal defender in front of him to beat a diving Ospina. Just two minutes later, Premier League Player of the Year N'Golo Kante took the ball inside Arsenal's half and fed it to Batshuayi, who beat Ospina with a left-footed shot from the edge of the box. Batshuayi scored his second goal within five minutes of the second half, deftly one-timing a low pass from Marco Alonso from just outside the area to fire a curving shot past Ospina.