David captured her second Seoul City Open crown by defeating Jenny Duncalf in four sets. A month later, on 24 July, she retained her World Games women's singles title with a win over archrival Natalie Grinham of the Netherlands in straight sets. A week later, on 1 August, David picked up her fifth consecutive Malaysian Open title, winning 11–6, 11–8, 9–11, 11–7 in a 60-minute match against 25-year-old Londoner, Alison Waters. David thus became the first player to win five Malaysian Open titles in a row since its inception in 1975. Dominating on the squash courts, David beat Natalie Grinham to win her third consecutive Singapore Masters championship, and her third title within a month. She overcame Natalie in three sets with a score of 11–9, 11–8 and 11–9 for her fifth WISPA title of the year. David celebrated another milestone in her squash career by moving into her 41st month as world number one in the September Women's World Rankings thus surpassing her mentor Sarah Fitz-Gerald as the player with the third longest ever reign at the top of the women's rankings. On 12 September, David lost to Madeline Perry in the British Open quarter-final in a five set match that lasted for 76 minutes; 15 days later, she recovered to defeat arch-rival Natalie Grinham in the final of the World Open Championship, obtaining the title for a record fourth time. David ended the year on a low when she lost in the semis to Jenny Duncalf in both the Qatar Classic and the US Open, the former ending in five sets. David started 2010 ranked number 1 for the 42nd consecutive month. She appeared in the WISPA calendar for the month of January. David competed in her first tournament in March, the US$53,000 Chennai Open; she won all her matches in straight sets and was crowned as the champion, avenging two straight defeats to Jenny Duncalf in late 2009. Thirteen days later, in the Kuala Lumpur Open, David defeated the fourth seeded Egyptian Omneya Abdel Kawy who upset second seed Jenny Duncalf in the semi-finals in straight sets to win her second successive WISPA title of the year. It was David's sixth title in the Kuala Lumpur Open tournament as she had previously won it in 2000, 2002, 2005, 2007 and 2008. David had won five more tour titles since April. This include winning the "prestigious" World Open