World number four Stacy Lewis has moved into a two-shot lead at the HSBC Women&aposs Champions after the second round in Singapore. The 28-year-old produced a bogey-free six-under 66, the equal-best round of the day, to move to 11-under for the tournament – two strokes ahead of a group of six players including overnight leader Azahara Munoz of Spain. Lewis birdied the opening hole at the Sentosa Golf Club&aposs Serapong Course on Friday and never looked back, grabbing further birdies at the 5th, 6th, 12th, 14th and 17th holes to lead the LPGA tournament with two rounds to play. Munoz stalled at the beginning of her second round, bogeying the par-four 3rd hole but hit back immediately with a birdie on the 4th. The 25-year-old Spaniard managed three more birdies before a bogey on the 15th halted her momentum and she finished with a two-under 70 to join South Koreans Chella Choi, Sun Young Yoo and Na Yeon Choi, as well as Paula Creamer of the USA and Thailand&aposs Ariya Jutanugarn on nine under overall. World number two Na Yeon joined Lewis in carding a six-under 66, as did Jutanugarn, who birdied the final two holes to join in a share of second place. Na Yeon could have been clear in second but for a bogey on the par-four 15th hole. Danielle Kang of the USA is next on the leaderboard, in eighth position on seven under, while Thailand&aposs Pornanong Phatlum is a further shot back in ninth. Scotland&aposs Catriona Matthew, Haeji Kang of South Korea and Sweden&aposs Karin Sjodin are tied for 10th at five-under. Karrie Webb (two under) is the best of the Australians in equal 28th spot while countrywoman Katherine Hull-Kirk is three shots further back on one over in a share of 43rd position.