Amber Christine Liu Chang (born July 6, 1984) is a former American professional tennis player and the wife of fellow tennis pro Michael Chang. At Stanford University, she was a two-time NCAA singles champion in 2003 and 2004. Her highest ranking was World No. 241 in singles and No. 600 in doubles.
Liu attended Stanford University from 2002 to 2006, where she studied economics, interned in investment banking at Goldman Sachs, and played on the women's tennis team, compiling a 94–23 record in singles and leading the team to become NCAA team champions for three straight years, 2004 to 2006. She was a two-time NCAA singles champion in 2003 and 2004, NCAA doubles finalist in 2005, and four-time All-American. Liu was the fourth Stanford women's player to become a two-time NCAA singles champion, following Patty Fendick, Sandra Birch and Laura Granville.
Her parents are Marvin and Valerie Liu, both Stanford graduates. Her father is a physician and her mother is an attorney. Liu was coached by Emmanuel Udozorh and International Tennis Hall of Fame inductee Michael Chang. Chang and Liu married on October 18, 2008, and have two daughters, Lani (born December 9, 2010) and Meile (born February 2013).