As part of her superstition, Watson has banned her mother and father from attending her matches, but is prepared to change her stance.
"I used to travel with my mum everywhere when I was starting," Watson told BBC Newsbeat. "But as I've got older I think it's easier for me to focus with just me and my coach and give my full focus to the matches.
"I've made a deal with my dad that if I reach the second week, he'll come and support me with my family."
Watson recently recovered from glandular fever.