Serena overcomes feisty Barty

This was the first significant test for the American, who has lifted the Coupe Suzanne-Lenglen three times in 15 previous Roland-Garros campaigns, and the manner in which she knocked out the feisty Australian 3-6 6-3 6-4, in an intense hour and 46 minutes, proved she has not lost the ability or desire to dig deep and be ready to quash any challenger.

“I have definitely always had that will to win. It was something I was born with, thank goodness,” she said. “You know, this is a Grand Slam. This is my first one back. I want to do the best that I can. I want to be able to just do my best and one day tell my daughter that I tried my best. When I was out there, that's all I was just trying to do, is just do that.”

Williams, 36, and now rather regally styled as "Madame Williams" by French chair umpires, is in the business of adding to her records. The 23-time Grand Slam champion had previously faced a seeded player in the first two rounds of a major three times, and won on all three occasions. So make that four, as of Thursday.

Barty had enjoyed the best clay-court season of her career en route to Paris, and can consider this match a breakthrough in her achievement on clay as well as a psychological boost that will go some way to negating the horrible experience she sustained as a teenage wildcard playing Serena in the first round of Australian Open 2014. Then, in the duo’s only previous meeting, Barty was beaten 6-2 6-1.

Barty started impressively, with focus and composure, and broke Williams to love to take a 4-2 lead in the first set, which she concluded in 29 minutes. She broke again to love in the first game of the second set, and it looked as if that 2014 Melbourne experience could be avenged with a near mirror-image score. The American, struggling with the slice Barty employs, was stringing together a huge tally of unforced errors.

But then, gradually, with feeling, the Williams warrior cry emerged and defiance became her trademark as she broke back twice early in the second set to level the match.

“I felt like in the first set I didn't play bad. I just didn't make any shots. So I guess that is bad. But I had all the right ideas, like, coming to the net and hitting all my shots. They just weren't going in. For me, that was a positive thing, because it wasn't like I was playing the ultimate match. I was just making so many errors. So I was, like, I've got to cut down on the errors, and I've just got to come out here and fight. And that's what I did.”

That warrior spirit is like the genie in the bottle: once out, it can transform even the most inconsistent of displays into a victory. As Barty said, “I think when push came to shove, the real Serena came out. And that's one of her best assets: when her back is against the wall, the best comes out. And that happened early in the second, and early in the third again.”

In the end, one point was the difference between the victor and the vanquished. This was a match played with tangible mutual respect, and the disappointed Barty might well rue the fact that she had her chances. “I think any time you get to play a champion like Serena, it's amazing. I mean, I played well. I feel like I wasn't really too much wrong. Give me half a dozen forehands and ten more first serves, and maybe it's a different outcome.”

What did we learn about Williams’s form and fitness? We learnt that it is present enough to play her way into a contest and prevent a player of guile from dictating a match; we learnt that her desire to win is as entrenched as ever.

It will be fascinating to see how her next opponent Julia Goerges copes with the challenge.