Having faced all three of them, the former world No 1 is in an excellent position to explain why Swiatek is such a difficult rival.
“To play against Iga Swiatek is much harder because she doesn’t give you anything. With Serena, in the end her game was much more aggressive or like Sharapova who I played.
But they would at least give you light points or make some mistakes,” she said on the No Challenges podcast.
“I feel like Iga Swiatek is not so aggressive but she really gives you nothing and she doesn’t even have one dip where she would have like one bad game, at least in the matches where I played her.
“Especially on clay, she moves so well. I felt like with Serena, if you can get her on the move you could have some light points.
“I’m sure Serena at her best she would beat Swiatek on hard courts for sure, but it’s a different game, the personality is very different from both of them.”