The Ultimate Tennis Showdown has made a big splash, adding Stefanos Tsitsipas and Matteo Berrettini to a stacked lineup that already includes Felix Auger-Aliassime, David Goffin, Benoit Paire, Lucas Pouille, Dustin Brown, Richard Gasquet and Alexei Popyrin.
One more Top 10 player is expected to be named by Friday.
The 10-player Ultimate Tennis Showdown is the brainchild of Patrick Mouratoglou and Alex Popyrin, the father of 20-year-old Alexei. The event will feature 50 matches played over five weekends, starting on June 13.
No fans will be in attendance, but Mouratoglou has spoken of his desire to have technology aid in fan interaction.