On Sunday, Liverpool was again held to a 1-1 draw by Merseyside rival Everton at Anfield, while Arsenal had to settle for a 0-0 tie at Cardiff City, last year's runner-up.
Doncaster Rovers of the Championship League gave Villa a scare, twice hitting the crossbar, but their game ended in a 0-0 tie.
The only guaranteed all-Premier League clash in the fifth round, which will be played Feb. 14-15, will be at Upton Park, where West Ham hosts Middlesbrough.
Sheffield United vs. Hull
Watford vs. Chelsea
West Ham vs. Middlesbrough
Sunderland or Blackburn vs. Coventry
Derby or Nottingham Forest v Man Utd
Swansea vs. Fulham
Liverpool or Everton vs. Doncaster or Aston Villa
Cardiff or Arsenal vs. West Brom or Burnley