Sorenstam has only dropped one shot in her two rounds so far
R2 LEADERBOARD:-11 A Sorenstam (Swe)-6 K Webb (Aus)-5 T Elosgui Mayor (Sp), S Sandolo (It), T Johnson (Eng)
World number one Annika Sorenstam stretched her lead to five shots at the halfway stage of the Dubai Ladies Masters thanks to a second-round 68.
The Swede birdied five of her opening 15 holes before dropping her first shot of the tournament at the eighth - her 17th hole.
Australia's Karrie Webb, ranked third in the world, also shot 68 to move into second place on six under.
England's Trish Johnson is in a three-way tie for third on five under.
Johnson had the best round of the day - a 67 - with a strong back nine of 32 which included three birdies in a row from the turn.
But she is still chasing Sorenstam, who marked the end of her round by going on a camel-riding trip in the desert.
"I'm really pleased to be 11 under at halfway, I played really well, especially getting to the turn in four under," she said.
"On the back nine, I just couldn't really get anything going. But just one bogey in 36 holes is pretty satisfying."
Yorkshire 17-year-old Kiran Matharu followed her opening 68 with a 73 and is still inside the top 10 on three under par.