Momentum changed after American Alison Lee, a Solheim Cup rookie, was penalized for picking up the ball when she thought her putt on No. 17 was conceded in the morning fourballs, which had been suspended on Saturday.
In the last four-ball match on Saturday, with a crucial point at stake, Sorenstam and Suzann Pettersen played one of the great matches ever, against Robbins and Laura Diaz.
England’s Paul Casey is a stroke further back in a five-way tie for fifth alongside 2012 victor Webb Simpson, Jim Herman, Australia’s Cameron Percy and 2007 champion Brandt Snedeker.