Fernando Torres' late goal salvaged Chelsea a replay with Brentford after an enthralling 2-2 draw in their fourth round tie at Griffin Park.
League One Brenford twice took the lead as they threatened a major shock, but cup holders Chelsea responded to keep themselves in the competition.
Marcello Trotta, who is on loan from Fulham gave Brentford a deserved half-time lead only for Oscar to draw Chelsea level with a fine solo effort early in the second half.
Harry Forrester restored Brentford's lead from the penalty spot on 73 minutes after Ross Turnbull brought down Tom Adeyemi.
However, Torres had the final word as his superb curling effort from the edge of the box seven minutes from time spared Chelsea's blushes.
More to follow.