The message was in response to a series of tweets the football star made on Thursday claiming that his former wife had committed adultery during their brief marriage.
According to TMZ, the warning was sent by Evelyn's attorney the same day as the remarks were made, asking Chad to stop harassing her online.
In trouble again: Chad Johnson tweeted allegations of adultery about his ex Evelyn Lozada, on Thursday
Sources close to Evelyn told the gossip website that the 35-year-old social media sensation's Twitter allegations were completely untrue.
The source claimed that the 37-year-old Basketball Wives star did not cheat on her spouse while they were in a relationship.
And if Chad did not stop making these false allegations she would be forced to get a restraining order.
Not happy about the online attack: Evelyn pictured in Los Angeles, in December
The tweets grabbed by TMZ before they were removed from Chad's Twitter feed made quite a few claims in his trademark off-color language.
The first online attack said: '@danikabagency Let's talk about the late night text messages and sneaking around she was doing while we together smashing CERTAIN people!!'
The following tweet expressed more than a little bitterness: '@danikabagency [...] you and your PR campaign to keep them 15 minutes alive... she better hope that YMCMB [...] keep her straight 4 life.'
YMCMB is an acronym for 'Young Money Cash Money Billionaires.'