A tearful Jannik Sinner dedicated his US Open title victory on Sunday to his aunt, who he revealed is battling serious ill health, admitting: “I don’t know how much longer I will have her in my life”.”I love tennis, I practice a lot for these stages but I realise that there is also a life away from the tennis courts and I would like to dedicate this to my aunt who is not feeling well,” said Sinner.