While Malaysia's Nicol David moves into her 26th successive month as world number one, Australia's world champion Rachael Grinham overtakes her younger sister Natalie to reclaim second place in the September Women's World Squash Rankings published by the Women's International Squash Players' Association (WISPA).

It was in June 2006 that Natalie Grinham - now playing under the Netherlands flag - first moved past her sibling in the list.  But 31-year-old Queenslander Rachael followed her victory over Natalie in the first World Open final featuring two sisters in Madrid last October by reaching four further WISPA World Tour finals - and cemented her status as the current player who has appeared in the most finals when she beat Vanessa Atkinson in last month's Alexandria Sporting Club Open final in Egypt to win her 28th Tour crown.

Natalie Grinham slips to three in the new list, ahead of USA's Natalie Grainger at four and England's Jenny Duncalf at five.

But New Zealander Shelley Kitchen records a career-high berth this month, rising a single place to No6.  The 28-year-old from Auckland followed her shock second round World Open defeat of Nicol David in Madrid last year by notching up her 12th Tour title at the Harrow Greenwich Open at the beginning of the year - and last month consolidated her status as the top Kiwi by becoming the New Zealand National champion for the fourth time.

England's Alison Waters also celebrates a career-best ranking in the new list - leaping three places to No8.  Winner of the British National title for the first time in February, the 24-year-old Londoner has enjoyed a good year on the WISPA Tour - reaching he semi-finals of both the KL Open and Seoul Open against the seedings, and claiming her fifth Tour final berth in the Irish Open in Dublin in April.


    1    [1]    Nicol David    MAS
    2    [3]    Rachael Grinham    AUS
    3    [2]    Natalie Grinham    NED
    4    [4]    Natalie Grainger    USA
    5    [5]    Jenny Duncalf    ENG
    6    [7]    Shelley Kitchen    NZL
    7    [6]    Tania Bailey    ENG
    8    [11]    Alison Waters    ENG
    9    [8]    Laura Lengthorn-Massaro    ENG
    10    [10]    Omneya Abdel Kawy    EGY
    11    [9]    Vanessa Atkinson    NED
    12    [12]    Vicky Botwright    ENG
    13    [13]    Kasey Brown    AUS
    14    [14]    Rebecca Chiu    HKG
    15    [15]    Madeline Perry    IRL
    16    [16]    Isabelle Stoehr    FRA
    17    [17]    Samantha Teran    MEX
    19    [19]    Jaclyn Hawkes    NZL
    19    [18]    Engy Kheirallah    EGY
    20    [20]    Annelize Naude    NED

For the complete WISPA ranking list, see www.wispa.net