World No. 69 Roman Safiullin of Russia, No. 82 Alexander Bublik representing Kazakhstan, and 18-year-old Brazilian talent Joao Fonseca have all confirmed their participation in the Challenger 175 event in Phoenix, USA.
The tournament is scheduled from March 11th to 16th, running alongside the prestigious Indian Wells Masters. Other notable players joining the Phoenix lineup include Kei Nishikori, Nuno Borges, and Flavio Cobolli.
Russian tennis player Pavel Kotov is currently listed as the fifth alternate for the tournament.