Can't tell much. She's just hitting straight forward, not running anywhere.
She had some of the greatest footwork, and was a great mover.
I'm positive she'd play much, much better than we should expect from a 43 year old, and I'm sure she could beat a lot of players. But, she still is 43. I don't think she'd be dominant like she was. It sure would be interesting to see her play for a year on the tour.
It would be a fantastic reality show - "The Comeback" starring Steffi Graf, Martina Hingis, Lindsay Davenport, and Martina Navratilova (maybe doubles only for Martina, unless she's game for singles). Basically, we follow these 4 players as they try to navigate today's tennis tour. Whoever posts the best results wins the prize!! (of course, they're all wealthy, so what would really motivate them).