Vegas sports agent Perry Rogers, who repped Steffi's husband Andre for years and was childhood pals with him as well, has taken Steffi to court -- the kind without white lines.

According to the suit, Rogers also repped Steffi, helping her pull in $20 mil. In return, he says he got stiffed. Now he's asking for more than $50,000 in commissions.

A delusional Agassi said, "I remain hopeful that we will be able to resolve our business issues with minimal damage to our families and mutual friends." Funny how lawsuits can ruin a relationship.