Aus 176-3 (Australia won toss)published at 05:36 Greenwich Mean Time 8 March 2015
Glenn Maxwell is the new batsman and he manages to avoid a golden duck by digging out a yorker for a single.
Australia beat Sri Lanka by 64 runs
Australia qualify for quarter-finals
Australia 376-9: Maxwell 102 (53)
Sri Lanka 213 (46.2): Sangakkara 104
Sangakkara's third straight World Cup ton
NZ beat Afghanistan by six wickets
Justin Goulding and Marc Higginson
Glenn Maxwell is the new batsman and he manages to avoid a golden duck by digging out a yorker for a single.
Andrew Samson
BBC Test Match Special statistician
"Before today Michael Clarke and Steve Smith had batted together 10 times in ODIs, adding 151 runs at an average of only 16.77 with a highest partnership of 47."
Jim Maxwell
BBC Test Match Special
"Clarke has done a good job for Australia - an excellent partnership."
Russel Arnold
Ex-Sri Lanka all-rounder on BBC Test Match Special
"What a champion, Lasith Malinga. The captain always brings him back into the attack and expects him to get wickets."
Where's Lasith been all this time? He's only bowled four overs up until now, but he returns to end Michael Clarke's run-a-ball knock with a fast, straight delivery which rattles the skipper's timbers. It's almost a no-ball, but Malinga just about gets some of his foot behind the line.
Michael Clarke is not naturally a big hitter, but he's taking it on here - only being denied another boundary through mid-off by some smart work in the field. Steve Smith is dictating things from the back foot as he picks up fours to fine leg and through point.
New Zealand captain Brendon McCullum: "I thought it was a really good performance today. Credit to Afghanistan for the way they fought back and posted a score which was a bit tricky for us. It is another World Cup win and we're pretty happy at the moment.
"The guys bowled really well and obviously Dan Vettori was the stand out performer. The fielding can go up a gear and in terms of batting it was not a bad chase, but we can improve."
On Vettori, who took 4-18 and passed 300 wickets in ODIs: "He is special cricketer for what he has achieved in all three formats of the game and over two decades. To see him achieve another milestone is fantastic, not only for him but also for the rest of the team. He is a special member of our team."
Russel Arnold
Ex-Sri Lanka all-rounder on BBC Test Match Special
"There's a decision to be made here. You need a fit player. It was the only question that needed to be answered - and I don't think Clarke has passed the test."
Australia 159-2 (30 overs)
Batsmen: Smith 65*, Clarke 59*
Fall of wickets: 19-1 (Warner 9), 41-2 (Finch 24)
Bowling figures: Malinga 4-0-16-0, Senanayake 7-0-42-0, Mathews 4-0-27-0, Prasanna 7-0-27-1, Perera 5-0-30-0, Dilshan 3-0-17-0
Australia won toss
The way the crowd applauded Michael Clarke's 57th ODI half-century, it's clear they continue to hold a warm regard for their captain. Every man, woman and child was up from their seats applauding a classy, composed knock. The team 150 is brought up with a single, and Australia have scored their last 50 off 39 balls. They've subtly raised it a notch, Michael Clarke adding another boundary with a gentle pull to backward square. The skipper follows it up with a lofted drive through wide long-off. Here we go.
Russel Arnold
Ex-Sri Lanka all-rounder on BBC Test Match Special
"Smith and Clarke came in at a tough time and it's been a top-class partnership. They've got this foundation and got Australia to a situation where they can think about 300. Now to try and bat Sri Lanka out of the game..."
Geoff Lawson
Ex-Australia fast bowler on BBC Test Match Special
"Clarke is not running as a batsman in this situation should do."
Listen to live TMS commentary by clicking on the audio icon.
Michael Clarke had the physio on a couple of overs ago and doesn't seem to be racing through for quick singles. There's nothing wrong with his ball striking, though, as he creams Senanayake through the covers for four. A gentle single then brings up his half-century off 56 balls. With the crowd still on their feet and applauding, Steve Smith adds to the feelgood mood by striking a maximum down the ground. The 100 partnership is also up.
Nobody does it better. Michael Clarke seizes on an over-pitched delivery and belts Angelo Mathews through the covers for four. Emphatic. Could these two take the powerplay early? Or will they leave it to Maxwell, Watson and Faulkner?
Tillakaratne Dilshan strikes me as a man who takes good care of his little goatee beard. It's finely trimmed, with defined stripes on his chin. Unique. Steve Smith is beginning to cut loose - almost literally as he comes down the track and strikes a single into the off side. Five from the over.
New Zealand spinner Daniel Vettori, who was named man of the match: "Both teams wanted to bat first, but we got off to a good start. The pitch was a a bit worn, it is usually pristine here, but obviously they had a game here a few days ago. Once we got the start with Trent Boult and Tim Southee it is easy to back that up.
"The World Cup is a lot of fun, being at home is an experience we will never forget. So far so good."
Listen to reaction on TMS via the 'Live Coverage' tab.
Captain Angelo Mathews tries to break this partnership, but he begins too short and is pulled and cut for singles by Clarke and Smith respectively. Clarke then gets three courtesy of a poor mis-field at mid-off and the skipper rolls his eyes. Best to avoid him in the lunch queue later.
Steve Smith is batting in a cap now. He looks in total control as he uses his feet to get to the pitch of the ball and drives Dilshan for a single. Michael Clarke, however, appears to be suffering a bit of back pain and grimaces at the non-striker's end following another good boundary stop by Lasith Malinga. Smith brings up his 50 by glancing four down to fine leg. He looks like he's on course for a big one here.
Game over. Unbeaten hosts New Zealand knew they were already assured of a quarter-final place before this match, and have now moved to brink of finishing as Pool A winners with a routine six-wicket win against minnows Afghanistan.
Black Caps batsman Corey Anderson swipes a boundary to clinch victory in the evening Napier sunshine with 13.5 overs to spare.
Earlier, veteran spinner Daniel Vettori helped set the platform with 4-18 from his 10 overs, restricting the associate nation to 186 all out.
Leg-spinner Seekkuge Prasanna takes just four steps before delivering the ball but none are needed when Steve Smith sits back in his crease and guides four backward of point. Don't bother chasing that one.