The commercial power of three tennis players in particular has been shown in the recent Sportico published Top 15 Highest Paid Marketable Female Athletes list which featured two players who have had in different seasons on the court but lucrative off it.
Naomi Osaka leads the list with $53.2m, with a staggering $52m of that coming from endorsements alone, while the same can be said for Serena Williams who pocketed $35m despite only playing on court for part of the year before her supposed retirement.
But for Emma Raducanu, she earned $23m in endorsements alone with $3.2m earned on the court during that time. This compared to Iga Swiatek who despite being World Number One in tennis doesn't seemingly have the commercial pulling power.
This is shown with her being one of only a few athletes with Ashleigh Barty being another example to have their salary shade their endorsements. Garbine Muguruza, Leylah Fernandez and Coco Gauff are also on the list.