Virat Kohli advanced four slots to ninth position after scores of 38 and 76 in the first Test against South Africa.
Sunak said he accepted Williamson's resignation "with great sadness" and thanked him for his "personal support and loyalty".
Premier New Zealand batsman Kane Williamson showed his prowess in shortest format as his smashing innings powered Northern Knights to a convincing seven-wicket victory over Sri Lanka's Southern Express in a rain-curtailed opening game of the Champions League T20 in Raipur.
Chennai Super Kings created history as they became the first player to use the Impact Player card as Tushar Deshpande replaced Ambati Rayudu in the playing XI.
IMAGES from Day 2 of the 1st Test played between New Zealand and Australia in Wellington on Friday.
Axar Patel claimed 2/23 and 2/16 in India's identical six-wicket wins over Afghanistan in the first two T20Is.
Sans Hardik, it's starting all over again for dominant India
Top order batsman Kane Williamson will return to New Zealand's lineup for the second Test against West Indies on Wednesday after coming through fitness tests on his broken thumb, captain Brendon McCullum said on Tuesday.
New Zealand have never beaten South Africa in a Test series in nearly a century of trying and will rarely have a better chance to break that drought than in two matches against a severely depleted side starting on Sunday.
A depleted Gujarat Titans bowling attack will have to raise its game by quite a few notches to stop a marauding Sunrisers Hyderabad, fresh from its record total against Mumbai Indians, in the upcoming afternoon IPL match in Ahmedabad on Sunday.
Kane Williamson hit a century and Luke Ronchi smashed 24 runs off one explosive over when the match was still in the balance to steer New Zealand to a four-wicket victory over Sri Lanka in the fourth One-Day International in Nelson on Tuesday.
Kyle Jamieson also returns to the squad after back surgery in February in a pace attack which includes captain Tim Southee and Matt Henry, who has recovered from injury.
'India in their home conditions are a different beast and they have started unsurprisingly strongly - I see them as favourites to win the competition at this stage, no matter what happens in Dharmsala (on Sunday),' writes Ross Taylor in his column for ICC Media Zone.
Kane Williamson was the proverbial cat with nine lives on Friday as he top scored for New Zealand with 47 against a fired up Indian pace attack keen on exploiting what they could from a green and bouncy Basin Reserve pitch.
Who do you think should be part of India's playing for the World Cup match against New Zealand?
Kiwi Ross Taylor's mammoth 290 in the WACA Test against Australia, propelled him to the top-10 list
New Zealand ripped through Australia's batting line-up on a lethal wicket to leave the hosts foundering on 81 for seven in their first innings at lunch on the second day of the second Test on Saturday.
New Zealand cricket captain Tim Southee said they were outplayed by an "ever-improving" Bangladesh in the opening Test in Sylhet and refused to blame the defeat on any fatigue from their one-day World Cup campaign in India last month.
Pakistan lost two early wickets before captain Babar Azam steadied the ship with an innings of 79.
India opener Shubman Gill's reign at the top of the ODI batters' list was short-lived as he was replaced by former Pakistani skipper Babar Azam in the ICC Player Rankings issued on Wednesday.
It was a starry affair at the Narendra Modi stadium as the skippers of all ten World Cup teams attended the captain's day.
IMAGES from the first semi-final of the ICC World Cup played between India and New Zealand at the Wankhede stadium in Mumbai on Wednesday.
Kane Williamson, spinners set up NZ's 35-run win over Ireland
Mohammed Shami's 7/57 is the best figures by an Indian bowler in the World Cup.
Virat Kohli's World record 50th ODI hundred, a scintillating century by Shreyas Iyer and Mohammed Shami's brilliant pace bowling powered the hosts past New Zealand in the first semi-final with a 70-run victory at the Wankhede stadium in Mumbai on Wednesday.
Rohit once again showcased a brief yet impactful innings, contributing significantly to India's bonus runs in the initial ten overs
IMAGES from the IPL match played between Delhi Daredevils and Sunrisers Hyderabad in New Delhi on Thursday
When New Zealander Daryl Mitchell was bought for a whopping Rs 14 crore by Chennai Super Kings during the IPL auction, he was wrapping presents for his daughter's birthday at his home and his heartbeat increased when his name popped up on the screen.
We had to fight really hard to reverse momentum, says Kane Williamson
'It's just trying to understand what the best recipe is for the team you are in with the resources that you have'
Will India retain the same playing XI?
Cricketing landscape is changing fast, need to strike balance: Williamson
Life has dealt her a hard hand - from growing up in foster care, to being homeless during the pandemic -- but Australian boxer Marissa Williamson has taken the knocks on the chin and is hoping to find a glory-giving home in the boxing ring.
In the latest ICC ODI Rankings, Mohammed Siraj was dethroned from the top as he slipped to third place, while Josh Hazlewood climbed to the top.
New Zealand seamer Trent Boult on Wednesday said that it will be difficult to find a charismatic leader like Brendon McCullum, while admitting that current skipper Kane Williamson is going "through pretty tough time" as a captain. Asked to compare the two, Boult gave an elaborate explanation. "Kane is a classy player and has been ranked as a top batsman for a reason. In a way, he has had pretty tough time walking into the role of captaincy. It has been a learning experience for the whole team to be honest.
The legendary Sunil Gavaskar dismissed conspiracy theories around the pitch for the World Cup semi-final between India and New Zealand, asking the "morons" to shut up and stop taking potshots at the hosts.
New Zealand skipper Kane Williamson was on Thursday hit by a bug, compounding the visiting team's misery, but opener Tom Latham sounded optimistic about the batsman's availability in the second Test against India beginning in Kolkata on Friday.
Since the start of the century, India have made it to two finals and two semis in five ODI World Cups but have just ONE title to show for. It's high time to end that barren run!
Shashank Singh played the innings of his life to power Punjab Kings to a famous win.
Afghanistan skipper Hashmatullah Shahidi said Chennai is a familiar venue for his team.