The Vics had the first chance after six minutes when Ian Herring's long throw was flicked on by Matt Bailey, but there was no-one on hand to convert the chance.
And they wasted a golden opportunity after 26 minutes when they failed to convert a number of chances in a frantic goalmouth scramble, which was eventually halted by Randolph.
The visitors were indebted to Randolph three minutes before the interval with his brilliant reaction save from O'Connor's header.
Charlton had the first strike at goal after the break when Jonjo Shelvey fired straight at Curtis Aspden on 55 minutes.
But the second half came to life after the arrival of Riley, with the teenager making no mistake after O'Connor's good work to send the home fans wild.
Live text and stats
Sunday, 8 November 2009
The FA Cup
Home Team
Score
Away Team
Time
Northwich
1-0
Charlton
FT
(HT 0-0)
Riley 81
Northwich
01 Aspden
02 Aspin
03 Brown
04 Bailey
05 Kerr yellow card
06 Herring
07 D'Laryea
08 O'Connor yellow card
09 Newby (Edwards 90+5)
10 Allan (Winter 87)
11 Elam (Riley 76 yellow card)
Substitutes
13 Spencer,
15 Vaughan,
12 Riley,
14 Winter,
17 Cadwallader,
16 Edwards,
18 Richards
Charlton
25 Randolph
03 Youga
18 S Sodje
31 Omozusi
35 Dailly
04 Bailey
06 Semedo yellow card (Wagstaff 85)
07 Shelvey (Burton 68)
08 Racon
11 Sam
15 McLeod (McKenzie 68)
Substitutes
32 Binks,
05 Llera,
12 Basey,
16 Wagstaff,
14 Spring,
09 McKenzie,
10 Burton
Ref: WebbAtt: 2,153
NORTHWICH
CHARLTON
Possession
Northwich50%
Charlton50%
Attempts on target
Northwich6
Charlton4
Attempts off target
Northwich2
Charlton2
Corners
Northwich3
Charlton4
Fouls
Northwich13
Charlton11
Final Result
Full Time
90:00+6:45 The referee ends the match.
90:00+6:17 Kelly Youga is penalised for a handball. Michael Aspin takes the direct free kick.
90:00+4:47 Substitution (Northwich) makes a substitution, with Declan Edwards coming on for Jon Newby.
90:00+3:35 Free kick awarded for an unfair challenge on Lloyd Sam by Nathaniel Kerr. Nicky Bailey shoots direct from the free kick, Harry Winter gets a block in.
90:00+3:04 Corner from the right by-line taken by Nicky Bailey, clearance made by Ian Herring.
90:00+2:35 Lloyd Sam crosses the ball, Ryan Brown manages to make a clearance.
90:00+2:12 The ball is delivered by Michael O'Connor.
90:00+1:27 Booking Booking for Wayne Riley for unsporting behaviour.
90:00+0:10 Harry Winter challenges Scott Wagstaff unfairly and gives away a free kick. Direct free kick taken by Darren Randolph.
88:51 Outswinging corner taken by Nicky Bailey from the right by-line, Jonathan D'Laryea manages to make a clearance.
88:22 Ian Herring delivers the ball, Darren Randolph makes a save.
88:10 The ball is swung over by Wayne Riley.
87:50 Lloyd Sam crosses the ball, Ian Herring makes a clearance.
86:53 Substitution (Northwich) makes a substitution, with Harry Winter coming on for Jonny Allan.
85:27 Booking Booking for Nathaniel Kerr for unsporting behaviour.
84:57 Substitution Jose Vitor Semedo leaves the field to be replaced by Scott Wagstaff.
83:14 Kelly Youga concedes a free kick for a foul on Michael O'Connor. Ryan Brown delivers the ball, Matthew Bailey takes a shot. Sam Sodje manages to make a clearance.
80:52 The assist for the goal came from Ian Herring.
80:52 GOAL - Wayne Riley:Northwich 1 - 0 Charlton Wayne Riley fires in a goal from deep inside the penalty box low into the middle of the goal. Northwich 1-0 Charlton.
80:38 The ball is sent over by Lloyd Sam, save made by Curtis Aspden.
80:06 Therry Racon takes a shot. Matthew Bailey manages to make a clearance.
78:19 The ball is delivered by Jon Newby, save by Darren Randolph.
77:31 Wayne Riley takes a outswinging corner from the right by-line played to the near post.
75:40 Substitution Wayne Riley is brought on as a substitute for Lee Elam.
75:28 Nicky Bailey sends in a cross.
72:39 Unfair challenge on Jose Vitor Semedo by Jonny Allan results in a free kick. Christian Dailly takes the direct free kick.
72:10 Matthew Bailey produces a left-footed shot from the edge of the box and misses to the left of the target.
70:52 Unfair challenge on Jonathan D'Laryea by Jose Vitor Semedo results in a free kick. Ryan Brown restarts play with the free kick.
69:58 The official flags Jonny Allan offside. Christian Dailly takes the indirect free kick.
69:09 Curtis Aspden takes the direct free kick.
69:09 Booking Jose Vitor Semedo booked.
68:21 Nicky Bailey sends in a cross, Jose Vitor Semedo challenges Michael O'Connor unfairly and gives away a free kick.
67:26 Substitution Izale McLeod goes off and Leon McKenzie comes on.
67:26 Substitution Deon Burton joins the action as a substitute, replacing Jonjo Shelvey.
65:40 Izale McLeod challenges Ryan Brown unfairly and gives away a free kick. Curtis Aspden restarts play with the free kick.
61:59 Jonny Allan fouled by Christian Dailly, the ref awards a free kick. Direct free kick taken by Michael Aspin.
60:56 Jose Vitor Semedo challenges Jonny Allan unfairly and gives away a free kick. Ryan Brown restarts play with the free kick.
58:26 Centre by Therry Racon, Ian Herring manages to make a clearance.
56:26 Ryan Brown challenges Izale McLeod unfairly and gives away a free kick. Christian Dailly takes the free kick.
55:11 Jonjo Shelvey takes a shot. Curtis Aspden makes a save.
53:56 Jon Newby fouled by Christian Dailly, the ref awards a free kick. The free kick is delivered left-footed by Ryan Brown from right channel, clearance made by Elliot Omozusi.
52:56 Izale McLeod is flagged offside by the assistant referee. Curtis Aspden takes the free kick.
51:55 Foul by Ryan Brown on Lloyd Sam, free kick awarded. Free kick crossed right-footed by Jonjo Shelvey.
51:27 Kelly Youga delivers the ball, save made by Curtis Aspden.
46:56 The referee blows for offside against Lloyd Sam. Free kick taken by Curtis Aspden.
45:01 The referee gets the second half started.
Half Time
45:00+1:09 The referee blows for half time.
45:00+0:19 The referee blows for offside. Indirect free kick taken by Curtis Aspden.
44:33 Free kick awarded for an unfair challenge on Sam Sodje by Ian Herring. Jonjo Shelvey restarts play with the free kick.
43:25 Foul by Michael O'Connor on Jose Vitor Semedo, free kick awarded. Direct free kick taken by Jonjo Shelvey.
42:04 Michael O'Connor takes a shot. Save by Darren Randolph.
41:13 Free kick awarded for an unfair challenge on Nathaniel Kerr by Jonjo Shelvey. Curtis Aspden restarts play with the free kick.
37:22 Izale McLeod is adjudged to have handled the ball. Curtis Aspden takes the free kick.
35:13 Therry Racon is adjudged to have handled the ball. Michael Aspin takes the free kick.
34:50 Matthew Bailey takes a shot. Save made by Darren Randolph.
34:24 Jonjo Shelvey concedes a free kick for a foul on Ian Herring. Free kick taken by Ryan Brown.
33:56 Darren Randolph restarts play with the free kick.
33:56 Booking Michael O'Connor is cautioned by the ref for unsporting behaviour.
33:45 Michael O'Connor gives away a free kick for an unfair challenge on Therry Racon.
33:05 Corner taken right-footed by Jonjo Shelvey, Sam Sodje takes a shot. Curtis Aspden makes a save.
32:40 Elliot Omozusi fouled by Jonny Allan, the ref awards a free kick. Free kick taken by Elliot Omozusi.
32:04 Michael O'Connor concedes a free kick for a foul on Jose Vitor Semedo. Kelly Youga takes the direct free kick.
27:53 The referee blows for offside. Darren Randolph takes the indirect free kick.
25:29 Corner taken by Lee Elam from the left by-line, clearance by Therry Racon.
24:39 Lee Elam takes the outswinging corner, Matthew Bailey takes a shot. Darren Randolph makes a save.
23:52 Unfair challenge on Lee Elam by Therry Racon results in a free kick. Lee Elam takes the direct free kick.
20:49 Nicky Bailey takes a shot from just outside the penalty area clears the crossbar.
19:24 A cross is delivered by Ryan Brown, Christian Dailly manages to make a clearance.
18:18 The ball is crossed by Lloyd Sam, Michael Aspin makes a clearance.
15:44 Nathaniel Kerr has an effort at goal from just outside the box which goes wide of the left-hand upright.
15:00 Foul by Lloyd Sam on Ryan Brown, free kick awarded. Ryan Brown restarts play with the free kick.
14:06 Foul by Jon Newby on Jose Vitor Semedo, free kick awarded. Darren Randolph restarts play with the free kick.
13:13 Jonny Allan challenges Lloyd Sam unfairly and gives away a free kick. Free kick taken by Elliot Omozusi.
11:09 Jonjo Shelvey delivers the ball, Curtis Aspden makes a save.
10:10 Elliot Omozusi fouled by Ian Herring, the ref awards a free kick. Free kick taken by Sam Sodje.
9:38 Matthew Bailey takes a shot. Darren Randolph makes a save.
7:09 The offside flag is raised against Lee Elam. Christian Dailly takes the indirect free kick.
6:34 Corner taken by Jonjo Shelvey from the right by-line, save made by Curtis Aspden.
5:35 Long range shot by Jonjo Shelvey goes wide right of the target.
0:00 The game kicks-off.
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