" I realised this year , that without putting 99.9 percent of your mind into tennis , I do n't think you can successful , " said the 22-year-old Medvedev .
<response> " I realised this year , that without putting 99.9 percent of your mind into tennis , I do n't think you can successful , " said the 22-year-old <person>Medvedev</person> . </response>