Arsenal opened the scoring in the second half with talented German youngster Thomas Eisfeld the man to find the back of the net.
West Brom found an equaliser soon afterwards through Saido Berahino to make it 1-1 with extra time looming and then penalties after that.
Arsenal managed to beat West Brom in penalties to ensure a fourth round match-up with Chelsea.
Half Time Score: West Brom 0 - 0 Arsenal
Full Time Score: West Brom 1 - 1 Arsenal
Goals and key events:
62' Thomas Eisfeld
71' Saido Berahino
At the completion of the matchyou will be able to view the highlights in the Highlights room page in the navigationor you can view the highlights if below aswell.