With a lead over her nearest rival, she led in the Women's World Squash Rankings published on 1 January 2009 by the Women's International Squash Players' Association (WISPA) – thus moving into her 30th successive month as the world’s number one female player. David headed an unchanged top four, with Natalie Grinham (Netherlands) at No. 2; her older sister Rachael Grinham (Australia) at No. 3; and Natalie Grainger, of the United States, at No. 4. In her first tournament of the year, the Kuala Lumpur Open, David's 17-month, 56-match winning run was brought to an end when she lost to Natalie Grainger in the final. After the defeat, David recovered to capture the inaugural Cayman Islands Open. She managed to avenge her loss to Grainger early in the year by beating her 11–8, 11–6 and 11–5 in the final. It is her 35th tour crown and her 50th appearance in a WISPA Tour final. A week later, David went on to win her second title of the year by again dispatching Grainger, this time in four sets.