Smith was born in Redhill, Surrey, to Robert and Gunilla Smith and started playing tennis at the age of 10 years. Aside from tennis, her other passions are shopping and football.
Smith first competed as a junior in February 2003 and her last junior tournament was in June 2006 in the qualifying draw for the Wimbledon juniors. She had limited success as a singles player; she reached only one final (in April 2006 at the Sutton ITF Junior Tournament where she was beaten by Naomi Broady) and did not reach the quarterfinals in any other tournament she played.
She had significantly more success as a junior doubles competitor, winning three titles at the Donnybrook Junior International, the Wrexham ITF Tournament and the Nottingham ITF. She also reached two more finals, four semifinals and one quarterfinal.
Over the three years of her junior career she reached a career-high combined ranking of world no. 665 and accumulated win-loss records of 8–13 in singles and 24–10 in doubles.
Smith played her first professional match in July 2004, courtesy of a wild card into the qualifying draw of the $10,000 ITF tournament in Felixstowe, United Kingdom. Following two wins, she lost in the final round of qualifying to Lena Keothavong, the younger sister of top-100 player Anne Keothavong. Smith then lost in the qualifying stages of the $10,000 ITF tournament in Manchester before going to Bolton and winning two matches to qualify for the $10,000 ITF tournament held there. In her first main draw match of her career, she lost to a fellow Brit Elizabeth Thomas. She finished 2004 without a world ranking.
In April 2005, Smith lost in the final round of qualifying for the $10,000 ITF in Porto Santo, Portugal, but was given a chance in the main draw as a lucky loser. She played well in this tournament before having to withdraw in the quarterfinals. August brought two more quarterfinal losses for Smith, the first in the $10,000 Wrexham ITF tournament and the second in the $10,000 Nottingham ITF tournament. The Wrexham event also saw her claim her first professional title as she won the doubles in partnership with Rebecca Llewellyn. Smith's final tournament of the year was the $10,000 ITF event in Sunderland, where she also reached the quarterfinals. She finished 2005 ranked world no. 660.
April and May 2006 saw good form from Smith; in April she reached the first ITF semifinal of her career in Bath and the following month she reached the quarterfinals in Bournemouth. In August, she reached the first singles final of her career in Ilkley, not dropping a single set en route. She was beaten in the title match by Anna Fitzpatrick. Smith managed to reach the quarterfinals as a qualifier in her very next tournament (ITF $10,000 Wrexham). In September, she won her first professional singles title at the $10,000 ITF event in Nottingham beating fellow Brit, Georgie Stoop, in the final. The rest of the year saw limited success for Smith in singles, though she did win a doubles title in the Redbridge with Anna Hawkins. She finished the season with a ranking of world no. 516.
In March 2007 Smith reached the third singles final of her career at a $10,000 ITF event in Hamilton, where she lost to Japan's Erika Sema. She got no more notable results until August that year when she hit another good patch, reaching the semifinal of the $10,000 ITF event in London before losing to Martina Babaková. Smith and Babaková also won the doubles in London. In her next tournament, a $10,000 event in Nottingham, Smith reached the final which she lost to Pauline Wong. She then immediately followed this up by qualifying for and reaching the quarterfinals of the $25,000 event, also held in Nottingham. The rest of the year was spent on the ITF tour but she lost before the quarterfinals in every tournament. Her end-of-year ranking was world no. 449.
2008 started disappointingly for Smith as she only managed to reach one ITF quarterfinal before entering the qualifying event for Wimbledon where she won one match (against Julie Coin of France) before losing in the second round. Later that year she won the second ITF title of her career, this time at the $10,000 event in London. She beat Rebecca Marino in the final. She then reached the semifinals in Limoges, France – another $10,000 event. In October, she reached the quarterfinals of a $50,000 home event in Barnstaple before losing to Lina Stančiūtė. Her year-end ranking was world no. 373.
Smith's 2009 season did not begin well. She won only one match out of her first eleven before going on to take the $10,000 ITF title in Felixstowe in July, beating Heather Watson in the semifinals and Tímea Babos in the final. In her next tournament, a $10,000 ITF in Frinton, she again came up against Watson in the semifinals but was defeated in straight sets. After this she reached only one more quarterfinal for the rest of the year in Koksijde where she lost to Sofia Shapatava. By the end of 2009 her singles ranking had fallen to world no. 441.
Smith won her first WTA title when she and Nicole Melichar beat Kirsten Flipkens and Johanna Larsson in Nuremberg.
Smith is coached by Dave Sammel at TeamBath.
Great Britain Fed Cup team