Thiago SILVA had a Chelsea debut to forget as he committed one of the worst mistakes of his glittering career as in a match Chelsea were lucky to escape with a draw.
The hugely decorated Brazil defender wore the captain's armband on his Premier League bow for Frank Lampard's side.
But he took his eye off the ball to allow it slip under his foot and gift Callum Robinson his second on the night as newly promoted West Brom raced into a three goal half-time lead.
The former Milan and PSG star had been substituted by the time Tammy Abraham scored Chelsea's injury-time winner.