After the injury, she took up wheelchair tennis, both playing it for Chile and also teaching it to others. Mardones had begun playing at the Grey Rock Tennis Club in Austin, Texas, and was there when she learnt that she had been selected for the Chilean team. She is supported financially through sponsorships, although says that she has to dip a little into her savings to pay for travel to the World Championships on some occasions. She took part in the Parapan American Games, where she won bronze medals in 2007 in Rio de Janeiro and in 2011 in Guadalajara. Also representing Chile, she took part in the 2012 Summer Paralympics in London, England, and the 2016 Games in Rio de Janeiro. She has won several awards, including those for inspiring others and a Golden Condor for best Paralympic Tennis performance in 2014.