WNBA star Jennifer Lacy believes her ex-GF Chamique Holdsclaw bashed in her car -- and fired a gun -- because she was upset Jennifer broke up with her last year ... this according to sources connected to the situation.
We're told ... Jennifer and Chamique dated for roughly 4 years ... and broke up sometime last year. Jennifer is NOT dating anyone else.
Our sources say Jennifer is the one who decided to end the relationship ... and apparently, the split didn't sit well with Holdsclaw.
After the attack, we’re told Chamique desperately tried to contact Jennifer, but Lacy -- still afraid for her life -- did not respond.
As TMZ first reported, Holdsclaw was arrested last night -- after turning herself in to Atlanta police.
We're told Jennifer is upset and embarrassed by the situation -- but as one source puts it, "She really hopes that Chamique gets the help she needs."