Sarah Leah Borwell (born 20 August 1979) is an English former professional tennis player who enjoyed her greatest success in doubles.

[1] She won a tennis scholarship to the University of Houston, where she was ranked as high as #8 in the NCAA[3] and completed a business degree.

[1] Borwell made her professional debut in August 2002 at the ITF Circuit tournament held in Bath, England where she suffered a first round defeat.

[4] She began 2003 with another quarter-final loss in January and two months later made her first appearance in an ITF tournament final, losing in straight sets to Australian Lisa McShea, 6–1, 6–4.

Borwell was then granted a wildcard into the qualifying event of her home Grand Slam tournament, Wimbledon, where she was defeated in straight sets by Argentine Gisela Dulko in the first round.

She played the entire year on the ITF Circuit, reaching only one quarterfinal and one semifinal (albeit as a qualifier) and as such her year-end ranking fell 68 places to No.

She did, however, beat two women ranked higher than herself to qualify for the Tier III Bell Challenge held in Quebec City, Canada in November.

May saw another ITF final appearance for Borwell in Nagano where she was forced to retire after losing a close first set 7–5 to Tomoko Yonemura.

In June, Borwell had her first victory in the main draw of a WTA Tour event after being given a wildcard into the Birmingham Classic and defeating fellow Briton Melanie South in three sets.

Following Wimbledon, Borwell reached the quarterfinals of one ITF tournament that year and was beaten in the first round of qualifying of the US Open by Stéphanie Cohen-Aloro.

She lost in qualifying for the Birmingham Classic, Eastbourne International and Wimbledon, before reaching the quarterfinals of the ITF tournament held in Felixstowe.

Borwell did, however, win a round with Colin Fleming in the mixed doubles, before losing in the second to top seeds Nenad Zimonjić and Sam Stosur.

At the Silicon Valley Classic, Borwell and Jones caused a huge upset in round one as they defeated Lisa Raymond and Rennae Stubbs, 6–0, 4–6, [12–10].

[6] The blow to the head, Borwell received in that match turned out to be a brain bleed that kept her out of action for about a month, causing her to miss the US Open.

Borwell returned to action at the Commonwealth Games in Delhi, competing for England in both the women's and mixed doubles.

Borwell and Skupski, however, combined well eventually winning the bronze medal, defeating Smith and partner Ross Hutchins.