Jannik Sinner, Aryna Sabalenka, Novak Djokovic and more of the 20 highest-ranked players included their handwritten signatures.

The couple are the latest high-profile players to confirm they want to compete.

While neither player referenced whom their statements were in response to, one can draw a conclusion.

"We see it as a profound injustice, that disrespect[s] an entire category of players," wrote the Italians on social media in a joint statement. And they weren't alone.

The event will be held over two days, during the week of the qualifying rounds for men's and women's singles. Early-round matches will be best-of-three sets played to just four games, with no-ad scoring.