Foden chests it down and Bernardo Silva drills an effort into the side netting. He wants his hat-trick.
40'
The last time that City failed to make it past this round was 2011-12 when they lost to Manchester United.
37'
Sanchez swings in the corner but Friend heads it straight at Steffen.
36'
Gabriel Jesus is played through and waits until the keeper commits himself to chip it over him. Unfortunately for him Kieftenbeld clears it before it goes in.
35'
First chance for Birmingham. Friend has a shot from just inside the box that Steffen gets down to comfortably.
34'
Game over. Mahrez passes to Foden and the Englishman strikes into the far bottom corner. The keeper got a touch but couldn't keep it out.
Gabriel Jesus has a shot from inside the box that is deflected wide.
10'
An early goal is just what the doctor ordered for Manchester City.
9'
And City have the lead. The ball is headed away by a Birmingham defender and Bernardo Silva hits the half-volley into the top corner from just inside the box. Good goal.
City are knocking the ball about looking for a breakthrough.
5'
No chances yet in the natch. It will be a tough afternoon for Birmingham. It goes to extra-time if it's a draw.
1'
And we're off.
Start of match
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Minute's silence for Colin Bell.
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City last won the FA Cup in 2018-19 and have won it 6 times.
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Birmingham have never won this trophy. The closest they came is runner up in 1930-31 and 1955-56. In the latter year they lost to... you guessed it, Manchester City in the final.
PRVW
City haven't lost a home game since 27th September 2020. They last failed to score in a home game on 29th January 2020 and they last at home in the FA Cup in 2015.
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Birmingham haven't beaten City since 2008. They haven't won away to City since 1998.