Chelsea 5-1 Chesterfield
Last season's finalists Chelsea progressed to the fourth round after thrashing fifth-tier side Chesterfield on Saturday evening at Stamford Bridge.
Thomas Tuchel's charges ran riot in the first half as Timo Werner, Callum Hudson-Odoi, Romelu Lukaku and Andreas Christensen found the back of the net in the first.
Hakim Ziyech was able to get his name on the score-sheet in the second half after converting a penalty on 55 minutes, although the visitors did bag a consolation through Akwasi Asante with 10 minutes left on the clock.
Leicester City 4-1 Watford
Defending champions Leicester City began the defence of their FA Cup title with a 4-1 thrashing of Watford at the King Power Stadium.
Youri Tielemans and James Maddison gave the Foxes a two-goal lead before Joao Pedro pulled one back for Watford on 27 minutes.
Harvey Barnes restored Leicester's two-goal cushion on 54 minutes before Marc Albrighton wrapped up the win in the final five minutes.
Newcastle United 0-1 Cambridge United
League One outfit Cambridge United caused an upset at St James' Park after defeating Newcastle United 1-0 on Saturday afternoon.
Joe Ironside was the hero for the visitors after bagging the winning goal in the 56th minute.
Millwall 1-2 Crystal Palace
Crystal Palace booked their place in the next round with a come-from-behind win over Millwall.
Former Arsenal strike Benik Afobe put the hosts ahead in the 17th minute, before Michael Olise and Jean-Philippe Mateta completed the turnaround in the second half.
Burnley 1-2 Huddersfield Town
Burnley become one of the first Premier League sides to be eliminated by lower league opposition after losing 2-1 to Championship side Huddersfield Town.
Matthew Pearson and Josh Koroma netted for the visitors after Jay Rodriguez had given Burnley the lead in the first half.
West Bromwich Albion 1-2 Brighton Hove Albion
Brighton and Hove Albion needed extra-time to overcome West Bromwich Albion at the Hawthorns.
Callum Robinson opened the scoring for the Baggies on 47 minutes, before Jakub Molder sent the game to extra-time with the equaliser on 81 minutes.
Neil Maupay was the hero in extra-time after getting the winning goal to send the Seagulls to the fourth round.
Here are nine transfers that have already been confirmed for the January transfer window:
