However , due to her absence from competition due to knee surgery , she dropped down the world rankings and at the time of her retirement on 18 November 2013 , she was ranked as the world No. 221 and British No. 6 .
However , due to her absence from competition , due to knee surgery , she dropped down the world rankings and at the time of her retirement , on 18 November 2013 , she was ranked as the world No. 221 and British No. 6 .