Serena Williams flaunts her slimmed-down figure in a new skinny jab ad

Serena Williams flaunted her slimmed-down figure in a new ad for skinny jab brand Ro on Thursday, after revealing she'd used their medication to drop a whopping 31lbs.As the company's new spokesman the tennis ace, 43, showcased her trim figure as she modelled a white co-ord, displaying her trim waist and toned legs.As well as posing with the medication, Serena also demonstrated how to use it, with shots of her injecting it into her thigh and stomach.On Wednesday Serena revealed she'd turned to the treatment after gaining weight following the births of daughters Olympia, seven, and two year old Adria, who she shares with husband Alexis Ohanian.