She is still ranked No. 1 -- next week would be her 200th week in the top spot -- and only four players have ever been ranked No. 1 more than that. She has 17 career Grand Slam titles, one shy of Martina and Chris Evert. Can she tie them? Pass them?
"I got stuck at 13 for a while. And I was really depressed about it. I'm never going to get to 14!" Serena said when asked about the numbers game. "And I think that was before I got ill. I was stuck at 13 and I was there for a while. I thought about that just a week ago. And I was like, 'Serena, don't put pressure on yourself.' I keep saying that I won't think about the numbers, but everyone is talking about it; everyone is thinking about it and maybe subconsciously it started to twirl in my mind and fester in my brain.
"I just need to relax and remember that time and that I've been in this position before. If it doesn't happen this year there is always next year."
Well, maybe. Serena turns 33 in two months and after the past seven months -- as well as that one day at Wimbledon -- the question is whether age is beginning to catch up with her.
As Kerber said, we will see how she does here, where Serena won the past two times she played this tournament. My guess is she will answer questions about where her current game stands more directly than the questions about that disturbing day at Wimbledon.