Ipswich and Leicester were unable to break the deadlock at Portman Road.
Leicester went close when Wayne Brown headed Lloyd Dyer's cross over, before Foxes striker Steve Howard missed the target with a header.
That prompted Ipswich boss Roy Keane to make a double change at half-time, sending on forward Tamas Priskin and highly-rated youngster Connor Wickham.
The home side improved and Jon Walters' header from Damien Delaney's cross was saved by City goalkeeper Chris Weale.
Teenager Wickham, who scored twice at Shrewsbury in the Carling Cup, shot wide following David Wright's cross as Ipswich enjoyed a spell of pressure.
But Leicester finished strongly, with Jack Hobbs and Howard missing chances for them in the closing stages.
Ipswich manager Roy Keane:
"I could give lots of excuses but we're professionals and have got to do better.
"The positives are that we got a point and kept a clean sheet. The players hung in there when they weren't quite at the races.
"We could have got something from the game and had two or three very good chances, so we'll take the point and move on."
Leicester boss Nigel Pearson: "We possibly shaded it, although it was a game of few chances and they put us under a bit of pressure in the second half.
"We were relatively pleased with how we applied ourselves but whether it's a point gained or two lost I'm not sure yet.
"We've made a decent start but it's not a case of being satisfied because even though we are new to the division there's an air of expectation on us to achieve a place in the play-offs.
"I fully expect us to do well and cause a few surprises."
90:00+4:14 The referee blows for the end of the match.
90:00+4:01 Andy King delivers the ball, save by Richard Wright.
90:00+3:55 The ball is delivered by Richie Wellens, clearance by David Wright.
90:00+1:45 Free kick awarded for an unfair challenge on Tamas Priskin by Jack Hobbs. Damien Delaney has a direct shot on goal from the free kick.
90:00+1:01 A cross is delivered by Owen Garvan, clearance made by Robbie Neilson.
90:00+0:54 Liam Trotter crosses the ball, Bruno Berner manages to make a clearance.
90:00+0:17 Andy King produces a cross, Richard Wright makes a save.
89:21 The referee blows for offside. Richard Wright takes the free kick.
88:29 Steve Howard fouled by Gareth McAuley, the ref awards a free kick. Free kick crossed by Matt Oakley.
86:51 Booking Chris Weale is cautioned.
85:36 Outswinging corner taken left-footed by Owen Garvan, Gareth McAuley produces a header from inside the six-yard box that clears the bar.
85:12 The ball is sent over by David Wright, Robbie Neilson manages to make a clearance.
84:34 Richard Wright restarts play with the free kick.
84:34 Booking Martyn Waghorn goes into the book.
84:26 Martyn Waghorn is ruled offside.
83:58 The ball is sent over by Andy King, save by Richard Wright.
82:49 Free kick awarded for a foul by Pim Balkestein on Martyn Waghorn. The ball is swung over by Matt Oakley, Headed effort from inside the area by Jack Hobbs misses to the right of the goal.
81:56 The assistant referee signals for offside against Liam Trotter. Indirect free kick taken by Chris Weale.
80:34 Damien Delaney takes the free kick.
80:34 Booking Steve Howard is shown a yellow card for unsporting behaviour.
80:13 Unfair challenge on Jaime Peters by Steve Howard results in a free kick.
79:44 Matt Oakley sends in a cross, Damien Delaney manages to make a clearance.
79:15 Corner taken right-footed by Nicky Adams to the near post, clearance by Liam Trotter.
78:06 The ball is delivered by David Wright, clearance made by Jack Hobbs.
75:31 Substitution Nicky Adams is brought on as a substitute for Lloyd Dyer.
75:18 Damien Delaney sends in a cross.
74:45 The ball is swung over by Lloyd Dyer, Gareth McAuley manages to make a clearance.
74:22 The ball is crossed by Steve Howard, clearance by Richard Wright.
73:07 Foul by Steve Howard on Damien Delaney, free kick awarded. Richard Wright restarts play with the free kick.
72:18 Connor Wickham concedes a free kick for a foul on Bruno Berner. Free kick taken by Chris Weale.
70:59 Tamas Priskin delivers the ball.
67:49 Gareth McAuley sends in a cross, save made by Chris Weale.
66:42 Effort from the edge of the area by Jaime Peters goes wide of the right-hand upright.
66:16 The ball is delivered by Jonathan Walters, Robbie Neilson makes a clearance.
65:20 Shot by Jonathan Walters from 20 yards. Save by Chris Weale.
63:25 Substitution (Ipswich) makes a substitution, with Owen Garvan coming on for Lee Martin.
62:42 Substitution Andy King joins the action as a substitute, replacing Dany N'Guessan.
62:42 Substitution Martyn Waghorn on for Matt Fryatt.
62:05 The ball is swung over by David Wright, Shot from close range by Connor Wickham misses to the right of the goal.
61:38 The ball is swung over by Damien Delaney, Jonathan Walters takes a shot. Save by Chris Weale.
60:48 Matt Fryatt is flagged offside by the assistant referee. Free kick taken by Richard Wright.
59:58 The ball is swung over by David Wright, Effort from the edge of the penalty box by Pim Balkestein goes wide of the right-hand upright.
59:31 Lee Martin takes a outswinging corner to the near post, clearance by Jack Hobbs.
59:24 The ball is swung over by Jonathan Walters, Wayne Brown makes a clearance.
58:51 Volleyed right-footed shot by Matt Oakley. Blocked by Gareth McAuley.
58:15 Tamas Priskin is ruled offside. Chris Weale takes the indirect free kick.
57:23 Matt Fryatt produces a left-footed shot from close range which goes wide of the right-hand post.
56:47 Unfair challenge on Richie Wellens by Liam Trotter results in a free kick. Chris Weale takes the free kick.
56:17 Dany N'Guessan produces a left-footed shot from just outside the box that misses to the right of the target.
55:33 Tamas Priskin has an effort at goal from outside the area which goes wide left of the target.
54:14 Bruno Berner takes a shot. Save by Richard Wright.
52:26 Bruno Berner gives away a free kick for an unfair challenge on Jonathan Walters. Lee Martin crosses the ball, Jonathan Walters takes a shot. Chris Weale makes a save.
51:56 Jonathan Walters delivers the ball.
51:23 Richard Wright takes the direct free kick.
51:23 Booking The referee shows Richie Wellens a yellow card for unsporting behaviour.
50:56 Richie Wellens challenges Lee Martin unfairly and gives away a free kick.
50:09 Corner taken by Matt Oakley from the right by-line, Damien Delaney manages to make a clearance.
49:35 The ball is sent over by Damien Delaney, clearance made by Jack Hobbs.
49:07 The ball is sent over by Tamas Priskin, Robbie Neilson makes a clearance.
48:40 Lloyd Dyer sends in a cross, Gareth McAuley manages to make a clearance.
48:20 Matt Fryatt produces a drilled right-footed shot from 18 yards. Save by Richard Wright.
47:42 Outswinging corner taken right-footed by Matt Oakley, Pim Balkestein manages to make a clearance.
47:36 Centre by Robbie Neilson, Lee Martin makes a clearance.
46:50 Free kick awarded for an unfair challenge on Wayne Brown by Connor Wickham. Chris Weale restarts play with the free kick.
46:08 Lloyd Dyer is adjudged to have handled the ball. Free kick taken by Richard Wright.
45:11 Connor Wickham challenges Matt Oakley unfairly and gives away a free kick. Jack Hobbs restarts play with the free kick.
45:01 The referee gets the second half started.
45:01 Substitution (Ipswich) makes a substitution, with Connor Wickham coming on for Jonathan Stead.
45:01 Substitution (Ipswich) makes a substitution, with Tamas Priskin coming on for Colin Healy.
Half Time
45:00+1:11 The whistle is blown to end the first half.
45:00+0:28 Corner taken right-footed by Lee Martin to the near post.
45:00+0:21 The ball is delivered by Liam Trotter, Wayne Brown manages to make a clearance.
44:05 Dany N'Guessan sends in a cross, save by Richard Wright.
43:43 David Wright crosses the ball, clearance by Jack Hobbs.
43:08 Steve Howard gives away a free kick for an unfair challenge on Gareth McAuley. Free kick taken by Richard Wright.
42:30 The official flags Matt Fryatt offside. Indirect free kick taken by Damien Delaney.
41:43 Jack Hobbs concedes a free kick for a foul on Jonathan Stead. The free kick is swung in left-footed by Damien Delaney, save by Chris Weale.
39:54 Lloyd Dyer has an effort direct from the free kick.
39:54 Booking Gareth McAuley goes into the book.
39:41 Steve Howard fouled by Gareth McAuley, the ref awards a free kick.
37:54 The ball is delivered by Richie Wellens.
37:32 Matt Fryatt takes a shot. Pim Balkestein gets a block in.
36:16 Centre by Damien Delaney, Matt Oakley manages to make a clearance.
36:05 The ball is swung over by Damien Delaney, Bruno Berner makes a clearance.
35:58 Centre by Damien Delaney, clearance made by Jack Hobbs.
35:48 David Wright delivers the ball, Jack Hobbs manages to make a clearance.
34:57 Colin Healy challenges Matt Fryatt unfairly and gives away a free kick. Free kick taken by Jack Hobbs.
34:32 Inswinging corner taken right-footed by Lee Martin from the left by-line to the near post, Matt Oakley manages to make a clearance.
34:19 Lee Martin crosses the ball, Wayne Brown makes a clearance.
33:52 A cross is delivered by Jonathan Walters, Jack Hobbs makes a clearance.
33:04 Jonathan Walters takes a shot from 25 yards. Save by Chris Weale.
32:23 The ball is delivered by Robbie Neilson, save by Richard Wright.
29:53 Shot by Jonathan Walters from 25 yards. Save by Chris Weale.
24:10 Free kick awarded for an unfair challenge on Matt Oakley by Jaime Peters. Chris Weale takes the direct free kick.
21:56 Corner taken by Matt Oakley.
21:27 Corner taken right-footed by Matt Oakley, Gareth McAuley makes a clearance.
19:20 Jack Hobbs crosses the ball, save by Richard Wright.
17:59 Close range strike by Steve Howard goes over the bar.
16:37 Matt Fryatt takes a shot. Save made by Richard Wright.
14:49 David Wright gives away a free kick for an unfair challenge on Lloyd Dyer. The free kick is swung in right-footed by Matt Oakley.
14:02 The ball is sent over by Jonathan Stead, Jack Hobbs manages to make a clearance.
13:21 Pim Balkestein fouled by Matt Fryatt, the ref awards a free kick. Damien Delaney restarts play with the free kick.
11:54 Matt Fryatt is flagged offside by the assistant referee. Pim Balkestein takes the indirect free kick.
11:25 Shot on goal by Robbie Neilson from just inside the area clears the crossbar.
11:12 Lloyd Dyer produces a cross, Pim Balkestein manages to make a clearance.
9:31 The ball is crossed by Lee Martin.
8:46 Effort on goal by Lee Martin from 6 yards. Save made by Chris Weale.
8:20 Short corner taken by Matt Oakley from the right by-line.
8:08 Matt Fryatt sends in a cross, clearance made by Colin Healy.
7:14 Damien Delaney has an effort at goal from long range that goes wide left.
5:31 Robbie Neilson delivers the ball, Richard Wright makes a save.
4:38 Jonathan Stead takes a shot. Save by Chris Weale.
2:05 Centre by Lloyd Dyer, Header from close range by Jack Hobbs clears the bar.
1:36 Unfair challenge on Matt Fryatt by Gareth McAuley results in a free kick. Matt Oakley restarts play with the free kick.
0:00 The game kicks-off.
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