A first change of the afternoon and it comes for the visitors.

A double change in fact as Lucia Leon and Anne Miewald make way for Sophie McLean and Abbie Lafayette.

Image source, Getty Images

Could this be the upset we're waiting for? Sheffield United are 1-0 up away at WSL side Tottenham.

A goal for Sophie Haywood from inside the six-yard box after Tara Bourne headed a free-kick across goal and Haywood was there to convert for the Blades.

Unlucky! Chelsea defender Ashley Lawrence curls in a speculative effort from the fringe of the area and it smacks the top of the crossbar and bounces out.

Neat possession from Watford, one of very few spells in this game so far, gives them a chance to attack the advanced Arsenal defence.

Good positioning from Lotte Wubben-Moy means she cuts out an attempted through ball before it reaches Michelle Agyemang.

Image source, Getty Images

In an all second-tier affair, Southampton have taken a 1-0 lead away at Sunderland, with Katie Wilkinson putting the Saints ahead.

Nottingham Forest have picked up where they left off at the start of the second half, taking a 3-0 lead away at Plymouth Argyle through Holly Manders.

Blackburn Rovers have also taken the lead away at Crystal Palace, with Megan Hornby putting Rovers ahead with just over 30 minutes to go.

Other scores from around the FA Cup fourth round (games with no WSL side):

Crystal Palace 0-1 Blackburn Rovers (13:00 GMT start)

Ipswich Town 1-3 Charlton Athletic (13:00 GMT start)

Plymouth Argyle 0-3 Nottingham Forest (13:00 GMT start)

Sunderland 0-1 Southampton (13:00 GMT start)

Burnley 0-0 Birmingham City (14:00 GMT start)

Reading 0-0 Wolverhampton Wanderers (14:00 GMT start)

Jess Park sends a fine dipping effort narrowly over the Durham crossbar.

This game is good and done, just about Durham trying to find a historic goal against a WSL side.

Another Arsenal miss!

A brilliant low cut back from Emily Fox towards Vivianne Miedema, but to the shock of all watching at home and in the ground, the Dutchwoman can only guide her finish wide of the target from five yards out.

Durham come as close as they have all day!

Poppy Pritchard pulls back to Mollie Lambert, whose deflected effort is fumbled behind by Khiara Keating.

Then Beth Hepple, making her club record 236th Durham appearance today, almost scores directly from the corner. Her set piece lands on the roof of the net with Keating scrambling.

What do Arsenal have to do to get a third goal this afternoon?!

A brilliant break down the right from Beth Mead and she threads a superb ball behind the Watford back line towards Caitlin Foord.

The Australian's pace gets her to the driven cross just in the nick of time, but she is denied superbly by a strong hand from Hornets keeper Jacqui Goldsmid.

Chloe Kelly the latest City player to fire on the Durham goal, this time hitting the side netting with a shot from the right.

That was City's 18th shot of the day, nine of them on target.

Image source, Reuters

A huge moment for Durham-born Steph Houghton. The Man City and England defender is on, replacing Kerstin Casparij for the final 10 minutes.

She gets a warm reception from around the ground.

How has Jess Park not made this 0-4!

Chloe Kelly has a shot pushed off to the left by Naoisha McAloon, and Park rushes in to try and finish from a tight angle but somehow skews it across the face of goal and behind.

West Ham are on a wretched run of nine without a win - what a time to break that run this would be!

Chelsea threaten from the off, playing in Johanna Kaneryd but her shot is blocked away.

Image source, Getty Images

Oren, Eton: Unbelievable! Can’t believe my beloved Nottingham Forest are winning in the Fourth Round, been a big fan for years and it’s great to see smaller teams doing so well!

Watford midfielder Flo Fyfe is sent sprawling into the advertising hoardings on the right hand side of the pitch.

She looks a little shaken but is thankfully fine to continue.

City look to have bundled home a fourth, but are denied by the offside flag.

A double change for both sides - for Man City, Yui Hasegawa comes off for Ruby Mace, while Alex Greenwood passes the captain's armband to Laia Aleixandri as she is replaced by Esme Morgan.

For Durham, Eleanor Ryan-Doyle and Ella Wilson are on, with Saoirse Noonan and Dee Bradley coming off.

Can Chelsea turn this around sans Sam Kerr?

The ball is back rolling at Meadow Park for the second half.