UW lost both games Sunday and has lost four of its last five overall by a single run.
Northwestern trailed 6-2 through four innings of Sunday's opener, but rallied to score six runs in the final three innings to take an 8-6 lead before hanging on for an 8-7 victory. In game two, the Wildcats broke a 2-2 tie with a run in the bottom of the fifth to prevail 3-2 and remain in first place in the Big Ten with an 8-0 conference mark and 26-9 record overall.
The Badgers, who were also swept by second-place and No. 1 ranked Michigan (40-3 overall, 7-1 Big Ten) this weekend, fell to 12-17 overall and 3-5 in conference play (eighth place).
In the first game Sunday, Badger left fielder Anastasia Miller went 4-for-4 and scored three runs, including one on her one-out solo home run in the bottom of the seventh that drew UW within 8-7. NU hurler Courtnay Foster, however, allowed just one more base runner before coercing a pair of groundouts to seal the Wildcats' win.
Foster pitched 3 1/3 innings, allowing three hits, two walks and one run in improving to 12-4. UW pitcher Eden Brock (9-6) took a complete game loss, giving up 15 hits and five earned runs.
After going 4-for-5 with three runs in game one, NU shortstop Stephani Churchwell was 3-for-3 in game two, including a two RBI single in the bottom of the second that gave the Wildcats an early 2-0 lead.
UW tied the game in the third on first baseman Katie Hnatyk's two-run homer, but Wildcat catcher Jamie Dotson's fifth-inning single plated Churchwell with the game-winning run.
Eileen Canney (14-14) pitched five strong innings for NU, allowing four hits and two earned runs. Foster picked up her third save of the year, pitching two scoreless innings.
Katie Layne (2-6) took the loss for the Badgers, scattering seven hits and two walks over six innings, while allowing three earned runs.
The Badgers travel to take on Valparaiso Wednesday at 5 p.m.