Australia has reclaimed the number-one Test ranking and has also retained its top ODI spot in the Reliance ICC Team Rankings.
This is the first time since December 2008 that Australia has been ranked number-one in both Tests and ODIs at the same time. Australia last held the number-one Test ranking in August 2009, when it was displaced after losing 2-1 to England.
Australia has now edged ahead of South Africa, which had held the number-one position since August 2012.
In the latest table, Australia has gained eight ratings points to move up from 115 to 123, while South Africa has dropped from 127 to be level on 123, with Australia ahead of South Africa by a fraction of a point.
The results from 2010-11 have now been dropped from the rankings calculation, while the results from 2012-2013 are now reduced to a weighting of 50 per cent. In 2010-2011, Australia had lost to India (2-0) and England (3-1), while it suffered a 4-0 defeat in India in 2012-2013.
Australia captain Michael Clarke was delighted with the news that his side was now on top of both the Test and ODI tables. "We are incredibly proud to be the number-one ranked team in the world in both Test and ODI cricket, which are two of the team's most important goals," said Clarke.
"There has been an enormous amount of hard work and effort on and off the field that has led to this result.
"However, the true test of a great side is sustained success and now our goal is to maintain these rankings and continue to play great cricket as we lead into challenging Test series against Pakistan and India, and the ICC Cricket World Cup at home," he added.
Looking back at the past season, which has turned out to be the cornerstone of Australia's rise to the number-one ranking in Tests, Clarke said: "We had a fantastic home summer against England and a great series win away against South Africa earlier this year, but the challenge now is to continue that form.
"We have a huge amount of respect for the South Africa side, and the length it held the number-one Test ranking is testament to the great side it is. South Africa will no doubt continue to be a formidable opponent in Test match cricket," said Clarke.
Australia was the first team to be ranked number-one in Test cricket when the ICC introduced the current rankings system in 2003. Since the system was introduced, Australia has been ranked as the number-one Test side for 74 months, more than any other side. South Africa is a distant second, having spent 23 months on top.
Reliance ICC Test Team Rankings (as of 1 May, after the annual update)
- (+1) Australia 123 (+8)
- (-1) South Africa 123 (-4)
- (+1) England 104 (-3)
- (+1) Pakistan 103 (+3)
- (-2) India 102 (-10)
- (+1) New Zealand 92 (+5)
- (-1) Sri Lanka 90 (+1)
- (-) West Indies 76 (-11)
- (-) Zimbabwe 40 (+6)
- (-) Bangladesh 21 (+2)
Reliance ICC ODI Team Rankings (as of 1 May, after the annual update)
- (-) Australia 115 (-2)
- (-) India 112 (-1)
- (-) Sri Lanka 111 (-1)
- (+1) England 110 (+2)
- (-1) South Africa 109 (-1)
- (-) Pakistan 100 (-1)
- (-) New Zealand 98 (+4)
- (-) West Indies 94 (+4)
- (-) Bangladesh 73 (-6)
- (-) Zimbabwe 61 (+6)
- (-) Ireland 34 (-4)
- (-) Afghanistan 34 (+4)