13 year old tennis wonder plays in London junior tournament . Believed to be Britain ' s most promising tennis girl , Miss B Coterton , a 13 year old Ramsgate girl , is playing in the junior tennis tournament at the Covered Courts Club , Dulwich . She has already achieved what no other child of her age has ever done , won a level women ' s doubles final at senior meeting . She did this in partnership with Miss J M Notley at the hard court autumn tournament at Westgate on Sea . Miss Costerton played at Hythe last September and won the women ' s singles handicap , the mixed doubles handicap and the girls singleshandicap . Photo shows Miss B Costerton in play at Dulwich . 30 December 1935