World number one Yani Tseng said Wednesday the “stress” of wanting to add US Women’s Open to her collection of major titles had overshadowed her efforts to win the trophy so far. Tseng became the youngest player ever, male or female, to capture five majors after claiming the Women’s British Open last year at the age of 22, but said the one she now craves is the US title — to complete a career slam. “For the Grand Slam, of course, US Open is one of my goals,” the Taiwanese superstar golfer said Wednesday at a Singapore press conference ahead of the $1.4-million HSBC Women’s Champions tournament. “If I don’t win this year, I still have many more years to come but I would love to win as soon as I can.” Tseng said the pressure of chasing the US Open trophy has haunted her in recent years, but vowed to take a more relaxed approach when she challenges for the this year’s title in Kohler, Wisconsin, in July. “Every time I go to the US Open I just feel more pressure than any tournament, just more stress,” she said.