Exeter make two changes at the start of the second half. Butterfield and Morrison are off and Hoskins and leading scorer Tom Nichols are on.
They look more dangerous straight-away as Nichols forces an error for the other Nicholls to smash a shot wildly wide.
After that it's back to a familiar pattern as Liverpool go close to almost certainly killing the game.
Jordan Ibe fires against the the underside of the bar but despite being almost there the ball stays inches short of completely crossing the line and Exeter are still alive.
A tough half for Exeter. Liverpool have controlled the play from start to finish and thoroughly deserve to lead.
Joe Allen's tenth minute goal came from a neat move on the left-hand side involving Christian Benteke and Brad Smith, who crossed for Allen to slide home from 6 yards.
Since then Liverpool have been able to carve out chances at will and should really lead by more.
Bobby Olejnik in the Exeter goal has kept his side in it. They have a mountain to climb in the second half but you never know in the FA Cup.
It's been all Liverpool in the first half. Chances for Christian Benteke who headed over from a decent position and Cameron Brannagan who tested Bobby Olejnik in the Exeter goal with a rasping shot.
Just a few moments ago Jordan Ibe forced Olejnik into another save then struck just over from a corner. Exeter need to stay in it for the next five minutes and get to half time and a much-needed breather.
After a tough start the Grecians fall behind. A neatly worked move from Liverpool results in Christian Benteke playing in Brad Smith who slides it back to Joe Allen 6 yards out and the Welshman cannot miss.
Exeter need to hold steady now otherwise their night may be over before it has begun.
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