It's going to be bad for tennis if their number 1 player are going to be suspended, and if I'm not mistaken, he could be out for 1 to 2 years. And that will not look good for him, but still though, he was found positive not just once, but twice.
So let's see, it's very hard decision to make for the body to suspend it, but rule is the rule and so they will have to implement it regardless of who the player is. Similar in boxing, when Ryan Garcia was tested positive and he was ban for 1 year. Although his suspension is going to be lift this April.
But it's totally different for tennis player as they usually play the whole year. As compare to boxers, with only 1 or 2 fights a year.
In recent time few serious controversies create concerns in Tennis because ITF is using double standards for players which are never been good if someone is guilty of having wrong then surely he deserved to be punished as other sports organizations are doing for these subsequent.
Tennis can lose its charisma if they fail to bring transparency because rule and laws are always equal for all and implemented for better future of game Sinner is done mistake so he deserved to be punished as they have done with other players but most chances nothing will happen like this and Federation will bring middle way for keeping their best player on track safely.