Weston (Fla.) Sagemont Upper School coach Adam Ross confirmed the news to Scout.com.
"UConn has been recruiting him a long time," Ross told Scout.com. "He's from the Bronx. He's a New York City kid. His dad retired and they moved to Florida the summer between eighth and ninth grade."
"He still has a lot of family in New York and that's home," he added. "UConn gives him the opportunity to go home. He really loves KO and he's fallen in love with their staff. KO did a great job recruiting him."
Ali, a 2015 recruit, watched Connecticut play in Madison Square Garden on Friday before making his way to Storrs (Conn.) for his visit.
According to Ross, Connecticut's system is a good fit for Ali, who is known as an athletic scorer.
"Their style of play is ideal for him," Ross said. "He's a very athletic guard that likes to play fast and get up and down. They've had guys like him that have been very successful. I think it's a great fit."
A four-star recruit, Ali is ranked No. 78 overall in the 2015 class. Ali is Connecticut's first commit of the class.