West Ham United Ladies will play at home against either Colchester United or Luton Town should they come through their rearranged third-round tie with Queen's Park Rangers.
Today's fourth-round draw followed the postponement of yesterday's visit of QPR to Harlow Town because of a waterlogged pitch, leaving Tony Marshall's side with another free weekend. The London cup derby will be rearranged for 1pm on Sunday 9 December.
Last weekend's league trip to Newquay was also called off, meaning the first team have not played since a 12-0 home success against Reading Royals on 18 November.