Table: polona hercog
[['date', 'tournament', 'surface', 'partner', 'opponents', 'score'], ['15 january 2007', 'algiers 2 , algeria', 'clay', 'rushmi chakravarthi', 'barbora matusova anna savitskaya', '6 - 2 , 6 - 0'], ['11 february 2008', 'mallorca 2 , spain', 'clay', 'stephanie vogt', 'leticia costas - moreira maite gabarrus alonso', '7 - 6 (7 - 2) , 6 - 3'], ['28 april 2008', 'makarska , croatia', 'clay', 'stephanie vogt', 'tadeja majerić maša zec peškirič', '7 - 5 , 6 - 2'], ['8 september 2008', 'sarajevo 2 , bosnia - herzegovina', 'clay', 'alberta brianti', 'çağla büyükakçay julia glushko', '6 - 4 , 7 - 5'], ['8 february 2010', 'cali , colombia', 'clay', 'edina gallovits', 'estrella cabeza candella laura pous tió', '3 - 6 , 6 - 3 ,']]
Statement: Polona Hercog partnered with Stephanie Vogt 2 time while she only partnered 1 time with everybody else
Statement: in 15 January 2007 and 28 April 2008 Polona Hercog and her Partner scored an average of 6.25
Statement: from 15 January 2007 to 8 February 2010 Polona Hercog only played on Clay Surface
Statement: Polona Hercog only lost a set on 8 February 2010 in Colombia
Statement: Polona Hercog partnered with Alberta Brianti after she had Stephanie Vogt as the Partner