Hampton was born in Frankfurt, West Germany, because her father, a career US Army officer, was stationed in Germany at the time. Her mother is from South Korea. Soon after, the family moved to the United States. She lived in Enterprise, Alabama, until she was 13; then, she moved to Auburn, Alabama. Before graduating from Auburn High School in 2008, Hampton twice won the USTA Girls’ 18s doubles title. Hampton turned pro in 2009, playing her first US Open in 2010.
After qualifying for the ASB Classic in Auckland, New Zealand, Hampton fell in the first round to Monica Niculescu. As a qualifier, she advanced to the second round of the Australian Open with a win over Mandy Minella. She was then beaten by eventual finalist, Maria Sharapova. Next, Hampton played in Memphis International where she beat defending champion Magdaléna Rybáriková in the first round but then fell to Vera Dushevina.
She then received a wild card into the BNP Paribas Open in Indian Wells, California where she made it into the fourth round before having to retire due to cramping against Agnieszka Radwańska, having defeated former champion Jelena Janković in the second round en route. Hampton had to go through qualifying to play in the Sony Ericsson Open, and then lost in the first round to Polona Hercog, whom she had beaten earlier at the BNP Paribas Open. Her next tournament was the Family Circle Cup. She beat compatriot Sloane Stephens but then lost to U.S. Open champion Samantha Stosur in the second round.
While struggling with back injuries during the clay court season, Hampton lost in qualifying at Internazionali BNL d'Italia and Internationaux de Strasbourg. Hampton was forced to retire in the first round of the French Open against Arantxa Rus due to an injury. After withdrawing from the Aegon Classic, Hampton upset 27 seed Daniela Hantuchová in the first round of Wimbledon. In the second round, she lost to Heather Watson.
Next up for Hampton was the U.S. Open, where she lost in the first round to Marion Bartoli. Her next tournament was the Korea Open where she went through qualifying. She then advanced to the second round but was beaten by Ekaterina Makarova. The next week Hampton played in the Toray Pan Pacific Open. After advancing to the third round with wins over Caroline Garcia and Kaia Kanepi, she fell short to Agnieszka Radwańska.
Her last tournament of the year was the HP Open in Osaka, Japan. She defeated Ayumi Morita and Tamarine Tanasugarn to get to the quarterfinals where she lost to top seed Samantha Stosur. With her best year on tour to date, Hampton ended the year ranked 71 in singles.
Hampton started off 2013 by playing in the ASB Classic. In the first round, she defeated defending champion and fourth seed, Zheng Jie. In the next round, Hampton beat Marina Erakovic to get a place in the quarterfinals. She defeated Kiki Bertens in the quarterfinals. Hampton lost a tight two-set semifinal with two tiebreaks to 2012 Wimbledon runner-up and world no. 4 Agnieszka Radwańska.
Her next tournament was the Australian Open. In the first round, she upset 31st seed Urszula Radwańska. Hampton then crushed qualifier Luksika Kumkhum, 6–2, 6–1. In the third round, she faced defending champion Victoria Azarenka. The match lasted over two hours before Azarenka prevailed in three sets. Hampton suffered a lower-back injury late in the second set.
At the Brussels Open, Hampton defeated Roberta Vinci to reach the semifinals, but lost in straight sets to Kaia Kanepi.
At the French Open, Hampton defeated 25th seed Lucie Šafářová in the first round in a tough three-set match and flew by Anna Karolina Schmiedlova in the second round. She defeated seventh seed Petra Kvitová in the third round in straight sets. Then she lost to Jelena Janković in the fourth round.
After qualifying for the 2013 Aegon International in Eastbourne, Hampton upset top seed and world no. 4 Agnieszka Radwańska in straight sets in the first round, and then went on to beat Caroline Wozniacki in the semifinals to reach her first WTA final. She lost in the final to Elena Vesnina in straight sets.
She lost to Sloane Stephens in the first round of Wimbledon.
Hampton reached the semifinals of the 2013 Bank of the West Classic in Stanford, California, where she was seeded fourth. With this result, she reached a career-high ranking of no. 24.
At the US Open, where Hampton was seeded at a Major for the first time, she reached the third round, but was again defeated by Sloane Stephens.
Hampton had a strong start to her 2014 season, advancing to the semifinals of the ASB Classic, when she was forced to withdraw due to a hip injury against Venus Williams.
She subsequently withdrew from the Australian Open, and then underwent six surgeries over the next 18 months.
Hampton did not play on tour in 2015.
Current through 2015 US Open.
Current through 2015 US Open.