Postpublished at 21:31 Greenwich Mean Time 26 January
Chelsea 0-0 Aston Villa
Villa's Ezri Konsa slices a shot wide after Djordje Petrovic makes a mess of a corner.
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FT: Tottenham 0-1 Manchester City - early Bobb effort ruled out for offside, Ake with late winner
FT: Bristol City 0-0 Nottingham Forest
FT: Chelsea 0-0 Aston Villa - Luiz goal ruled out for handball
FT: Sheff Wed 1-1 Coventry - Torp scores on debut, Gassama levels for hosts
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Gary Rose and Emlyn Begley
Chelsea 0-0 Aston Villa
Villa's Ezri Konsa slices a shot wide after Djordje Petrovic makes a mess of a corner.
Tottenham 0-0 Man City
Clinton Morrison
Former Republic of Ireland striker on BBC Radio 5 Live
Kevin De Bruyne and Doku have livened it up. Doku looks sharp.
Bristol City 0-0 Nottingham Forest
Brilliant counter-attack from Bristol City from Forest's corner but Cameron Pring slams the ball into the side-netting after beating two defenders with his first touch.
Tottenham 0-0 Man City
Clinton Morrison
Former Republic of Ireland striker on BBC Radio 5 Live
Phil Foden will now probably go through the middle in that false number nine role.
Djeidi Gassama (84 mins)
Back level!
Djeidi Gassama has been Sheffield Wednesday's best player tonight and he gets the equaliser with a low strike that looks to take a little deflection.
Tottenham 0-0 Man City
Pep Guardiola blinks first as he makes a double change.
On comes Kevin de Bruyne and Jeremy Doku, with Oscar Bobb and Julian Alvarez making way,
Bristol City 0-0 Nottingham Forest
Forest win their first corner of the game. Bristol City haven't had a shot on target. What a classic.
Sheff Wed 0-1 Coventry
Into the final seven minutes and Sheffield Wednesday need a moment of magic. They are seeing a lot of the ball but struggling now in the final third.
Tottenham 0-0 Man City
Phil McNulty
BBC Sport chief football writer at Tottenham Hotspur Stadium
One or two moments of threat from Spurs now. Not actual clear chances as yet but at least they are now spending time in Manchester City's half.
Wonder how long it will be before Pep Guardiola introduces Kevin De Bruyne?
Tottenham 0-0 Man City
Tottenham have an opportunity with a free-kick but Pedro Porro's delivery is thumped clear.
Chelsea 0-0 Aston Villa
Chelsea scream for a penalty as Conor Gallagher goes down in the box but the referee says no.
Bristol City 0-0 Nottingham Forest
Nahki Wells and Harry Cornick are on for Bristol City.
Tottenham 0-0 Man City
We've just passed the hour mark and both managers will be starting to think about changes. It has been a really good game but a bit more creativity will do neither side any harm.
Chelsea 0-0 Aston Villa
Chelsea bring on Armando Broja and Mykhailo Mudryk in the hunt for goals.
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Is Ortega the best number two ever?
Phil, Birmingham
FA Cup fourth-round games that are drawn go to replays, just in case anybody was setting in for some extra time. They'll be done at 90 minutes tonight.
Tottenham 0-0 Man City
Clinton Morrison
Former Republic of Ireland striker on BBC Radio 5 Live
I feel like we're getting closer to a goal, Tottenham have come into the game more and are causing problems.
Chelsea 0-0 Aston Villa
Villa's star striker Ollie Watkins has been quiet tonight. He has a rare chance but it's saved by Djordje Petrovic.
And then the keeper makes an excellent stop to get down low to his corner to keep out Matty Cash's drive.
Tottenham 0-0 Man City
There's shout for a penalty from Tottenham fans behind the goal but no player appeals and seeing the replay it is clear to see why as the ball strikes Ruben Dias in the chest inside the Manchester City box.
Tottenham 0-0 Man City
Clinton Morrison
Former Republic of Ireland striker on BBC Radio 5 Live
Ortega is really quick and he smothers the angle for Johnson. It's really good.