"I can't wait to come out tomorrow," Tseng said. "It will be a brand new day, but we'll keep the same strategy and make as many birdies as I can."
Ranked No. 1 in the world for 109 weeks, the 26-year-old Taiwanese player has slipped to 75th and is winless in 85 events since the 2012 Kia Classic. The 15-time tour winner tied for second in March in the LPGA Thailand for her only top-10 finish of the year.
"I've been working on my game forever, like every day," Tseng said. "It's just exciting. I really want to win a tournament for sure. We only have probably seven, eight tournaments left, but it's never too late. Just very happy my game's really coming back. ... It doesn't matter if it's this week or next week or next year, just try to be patient as much as I can and stay positive."
Third-ranked Stacy Lewis, the 2012 winner, played alongside Tseng.
"You can see she's confident," Lewis said, "She's firing at pins that are tucked and hidden. She hits it so far and hits the irons so high that they have a lot of spin, so she's able to attack pins that nobody else is. ... It's fun to see her playing the way she should be."
Tseng reached 10-under 134 on the links-style Senator Course with her lowest round since a 63 in the 2013 LPGA Thailand.
"It just feels like this course suits my game," Tseng said. "I feel very comfortable and confident out there. I'm just kind of getting back to enjoy playing golf again and it was so much fun to play with Stacy. 
"She made a bunch of birdies and we kind of kept that momentum keep going. ... Stacy's amazing. I don't know how to describe the feeling because we are good friends, but at the same time we're competitors, too."
Austin Ernst was second after a 65, and playing partner Lexi Thompson, the 2011 winner at age 16, was third at 8 under after a 67.
Sydnee Michaels and Julieta Granada were still on the course at 7 under when play was suspended for the day because of more rain and darkness. Michaels had four holes left, and Granada two.
Lewis topped the group at 6 under after a 68. Second last year in Prattville, the Texan is coming off a playoff loss to Lydia Ko on Sunday in British Columbia in the Canadian Pacific Women's Open.
"I still haven't put it all together," Lewis said. "A bit of a frustrating round. I had a good front nine, had it going, played 10 really good holes and then just kind of stalled the last eight."
Ernst also eagled the eighth hole and had eight birdies and three bogeys. The 23-year-old former LSU player won the Portland Classic last year for her lone LPGA Tour title.
"I've been playing well. It's really just a matter of getting some putts to fall," Ernst said. "I hit it really well today. I had a few holes that where I kind of hit some loose shots, but kind of just took my bogey and kind of went on with it. 
"And then I had probably three wedge shots that I hit up within a foot and I just went up and tapped them in. I think I hit two more where I had about 3 feet."
Canadian teen Brooke Henderson, whose forefathers emigrated from Scotland,  was 3 under after a 70. The 17-year-old Henderson won her first LPGA Tour title two weeks ago in Portland, Oregon.
"I would have liked a little more today, but overall it was a pretty solid round and I gave myself quite a few opportunities," Henderson said.
SCOREBOARD
par 144 (2x72) Yardage 6,599
1 Yani Tseng 70  64 . 134
2 Austin Ernst 70 65 135
3 Lexi Thompson 69 67 136
T4 Julieta Granada* 68 60 128
T4 Sydnee Michaels 67 54 121
T6 Stacy Lewis 70 68 138
T6 Brittany Lang 65 73 138
T6 Sakura Yokomine 71 63 134
T6 Ryann O'Toole 67 67 134
T6 Tiffany Joh* 67 46 113
T11 Sei-Young Kim 69 70 139
T11 Wei-Ling Hsu 69 70 139
T11 Kris Tamulis 71 68 139
T11 Cydney Clanton* 72 55 127
T11 Jackie Stoelting 69 54 123
T16 Mi Hyang Lee 71 69 140
T16 Hyo-Joo Kim 68 72 140
T16 Kelly Tan 72 68 140
T16 Sadena Parks 71 69 140
T16 Simin Feng 68 72 140
T16 Jaye Marie Green* 71 60 131
T22 Jodi Ewart Shadoff 73 68 141
T22 Ashleigh Simon 71 70 141
T22 Brooke Henderson 71 70 141
T22 Ariya Jutanugarn 68 73 141
T22 Xiyu Lin 70 71 141
T22 Christina Kim 72 69 141
T22 Haru Nomura 72 60 132
T29 Ally McDonald 70 72 142
T29 Minjee Lee 72 70 142
T29 Karlin Beck 72 70 142
T29 Felicity Johnson 74 68 142
T29 Shanshan Feng 72 70 142
T29 Anna Nordqvist 72 70 142
T29 Candie Kung 69 73 142
T29 Hee Young Park 73 65 138
T37 Angela Stanford 72 71 143
T37 Min Seo Kwak 71 72 143
T37 Alena Sharp 71 72 143
T37 Carlie Yadloczky 69 74 143
T37 Brittany Lincicome 74 69 143
T37 Nannette Hill* 71 63 134
T37 Jing Yan* 72 55 127
T44 Dewi Claire Schreefel 72 72 144
T44 Brooke Pancake 72 72 144
T44 Moriya Jutanugarn 73 71 144
T44 P.K. Kongkraphan 74 70 144
T44 Jee Young Lee 74 70 144
T44 Giulia Sergas 72 72 144
T44 Chella Choi 74 61 135
T44 Janie Jackson* 69 66 135
T44 Dori Carter 70 58 128
T44 Victoria Elizabeth* 71 57 128
T44 Jeong Eun Lee 72 52 124
T44 Ji Young Oh* 70 49 119
T56 Yueer Cindy Feng 72 73 145
T56 Lisa Ferrero 73 72 145
T56 Mina Harigae 72 73 145
T56 Paula Reto 76 69 145
T56 Jane Rah 71 74 145
T56 Emma Talley 74 71 145
T56 Karine Icher 74 62 136
T56 Haeji Kang 72 53 125
T64 Katherine Kirk 69 77 146
T64 Thidapa Suwannapura 72 74 146
T64 Caroline Masson 73 73 146
T64 Kim Kaufman 71 75 146
T64 Min Lee 74 72 146
T64 Sarah Jane Smith 73 73 146
T64 Ashli Bunch 74 72 146
T64 Laetitia Beck 73 73 146
T64 Nontaya Srisawang 72 74 146
T64 Emma De Groot 73 73 146
T64 Belen Mozo 74 72 146
T64 Sophia Popov 74 72 146
T64 Ai Miyazato 75 67 142
T64 Kelly Shon 73 57 130
T78 Therese Koelbaek 68 79 147
T78 Natalie Sheary 75 72 147
T78 Julie Yang 73 74 147
T78 Lee-Anne Pace 71 76 147
T78 Asako Fujimoto 78 69 147
T78 Meena Lee 74 73 147
T78 SooBin Kim 72 75 147
T78 Amelia Lewis 78 69 147
T78 Katy Harris 74 73 147
T78 Beatriz Recari 75 56 131
T78 Katie Burnett 75 52 127
T89 Rachel Rohanna 71 77 148
T89 Laura Diaz 69 79 148
T89 Paola Moreno 71 77 148
T89 Kendall Dye 74 74 148
T89 Celine Herbin* 72 67 139
T89 Stacey Keating 74 58 132
T89 Lisa McCloskey 75 53 128
T89 Danah Bordner 77 51 128
T97 Chie Arimura 75 74 149
T97 Stephanie Meadow 79 70 149
T97 Marina Alex 72 77 149
T97 Jennifer Song 73 76 149
T97 Sandra Changkija 77 72 149
T97 Sara Maude Juneau 76 73 . 149
T97 Jacqui Concolino 76 73 149
T97 Marta Sanz Barrio 76 61 137
T97 Kristy McPherson 76 53 129
106 Alison Walshe 76 .   76
T107   Cheyenne Woods 76 74 . 150
T107   Amy Anderson 75 75 150
T107   Maria Hernandez 76 74 150
T107 Paz Echeverria 75 75 150
T107 Becky Morgan 72 78 150
T107 Demi Runas* 73 61 134
T113 Mallory Blackwelder 77 74 151
T113 Jenny Suh 77 74 151
T113 Marissa Steen 76 75 151
T113 Elizabeth Nagel 75 76 151
T113 Giulia Molinaro 79 72




151
T113 Moira Dunn 76 63




139
T113 Susana Benavides 77 58




135
T113 Heather Bowie Young* 77 58




135
T121 Nicole Jeray 74 78




152
T121 Ayako Uehara 77 75




152
T123 Jennifer Kirby 77 76




153
T123 Ju Young Park 72 81




153
T123 Krista Puisite 77 76




153
T123 Louise Stahle 76 77




153
T127 Jean Reynolds 78 76




154
T127 Jennifer Gleason* 76 62




138
T129 Sarah Kemp 75 80




155
T129 Candy Hannemann 78 77




155
T131 Kathleen Ekey 78 78




156
T131 Garrett Phillips 78 78




156
T131 Luciane Lee 76 80




156
134 Vicky Hurst 75 82




157
WD Joanna Klatten WD   WD




WD
WD Rebecca Lee-Bentham WD  WD




WD
T135 Sue Kim 74 WD




74
T135 M.J. Hur 74 WD




74
137 Pernilla Lindberg 75 WD




75
T138 Eun-Hee Ji 78 WD




78
T138 Birdie Kim 78 WD




78
T138 Charley Hull 78 WD




78
141 Silvia Cavalleri 80 WD




80









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