Some good news, bad news for Serena Williams ...
The Good News -- The Women's Tennis Association (WTA) has announced massive rule changes allowing athletes like Serena to wear full catsuit outfits during 2019 matches.
The Bad News -- The French Open -- where the whole catsuit drama went down -- could still ban it because the rule change doesn't apply to Grand Slams.
Remember, French Open officials created a huge controversy after they told Serena she couldn't wear her custom-made Nike compression suit ... despite the fact that it was designed to increase blood circulation in the wake of her health issues surrounding blood clots.