Jannik Sinner refused to rule out participating in a player boycott of the grand slam tournaments and accused the majors of disrespect for the top players due to their lack of response in the ongoing prize money dispute. “It’s more about respect, you know?” said Sinner, the men’s No 1. “Because I think we give much more than what we are getting back. It’s not only for the top players; it’s for all of us players. Again, from men’s and women’s side, we are very, very equal. I think the top 10 men, top 10 women, we wrote a letter. It’s not nice that after one year we are not even close to the conclusion of what we would like to have. “Talking in other sports, if the top athletes, they send important letters, I truly believe that within 48 hours you have not only a response but you also have a meeting with this kind of thing, so … Of course, we talk about money.…