South Korea's Amy Yang has shot the second lowest score after 36 holes in the Women's US Open history ©Getty Images

South Korea's Amy Yang tops the clubhouse standings after the second day of the US Women's Open on seven-under par, having produced a round of 66 at the Lancaster Country Club in Pennsylvania.

Yang has firmly put herself in contention to win her first major title after backing up her three under par score on the opening day's play with another excellent round, which saw her birdie the four straight holes on the back nine to assume the lead.

Her two-day total of 133 strokes is the second lowest 36-hole score in the history of the US Women's Open, but Yang may feel she could have been in a better position if she had not been required to play the remaining three holes of her opening round this morning.

The 25-year-old was one of 56 players forced to resume their first round due to the postponement of play yesterday (July 9) due to adverse weather conditions at the course and Yang dropped two shots with bogeys on the 17th and 18th holes.

Yang will begin the third day of the four-day tournament with a three shot advantage over her nearest rivals Shiho Oyama of Japan and Stacey Lewis of United States, both on four-under par.

Japan's Shiho Oyama shot the joint lowest score of the day to move into contention for the title
Japan's Shiho Oyama shot the joint lowest score of the day to move into contention for the title ©Getty Images

Oyama, though, will feel particularly confident heading into the business end of the tournament, having posted the joint best score with Yang on the second day, recording six birdies and two bogeys during her round.

Overnight leaders Marina Alex of the United States and Australia's Karrie Webb remain in the mix for the title, with Alex currently lying in fourth position on three under par, while Webb is one of sixth women on the leaderboard who are two under for the tournament.

South Korea's Inbee Park, winner of the title in both 2008 and 2013, is one of those on two under par and the sixth time major winner will be targeting a better round tomorrow having shot an even par 70 on the second day.

Defending champion Michelle Wie of the US enjoyed a better day on the course by carding a two-under par round of 68, but the 25-year-old will need to produce two superb rounds to remain in with a chance of retaining her title.

She is currently even for the tournament, sitting seven shots behind Yang.

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