It has been a season to savor for Serena Williams, but also a season to savor Team Williams, the diverse group that provides the star’s emotional, logistical and technical backup: Her longtime hitting partner, Sascha Baijin, is German; her physical therapist, Esther Lee, was born in the United States and raised in Canada; her fitness coach, Mackie Shilstone, and personal chef, Lauren von der Pool, are Americans, and her coach and confidant, Patrick Mouratoglou, is French. Mouratoglou has been the highest-profile addition. He is a veteran coach with an eponymous academy near Paris who analyzes the game for print and television outlets in Europe and has worked with numerous leading players, including Marcos Baghdatis, Grigor Dimitrov, Aravane Rezai and Anastasia Pavlyuchenkova. Mouratoglou, 43, never achieved greatness as a player, but in working with Williams he has satisfied a long-standing ambition to coach a major champion. Their relationship is presumed to be romantic as well as professional, and since he joined her team in 2012 after her shock first-round defeat at the French Open, she has won four Grand Slam singles titles and produced an astounding overall record of 104-5. He recently spoke with Christopher Clarey of The International New York Times.

Q. So are you at peace now that you’ve coached a Grand Slam champion?

A. I didn’t have to have that to feel at peace.

Q. A sense of personal satisfaction then?

A. No, I try not to be satisfied because when you are satisfied I feel you stop progressing. I’m ambitious. I was always ambitious, no matter what I did because my parents educated me like that. When I started this profession I said my goal was to be good enough at what I do so that the best players in the world would want to work with me to be able to win major tournaments. That does not mean I don’t like working with young players and with everyone in fact. I always took a lot of pleasure in it and when I’m at the academy I work with everyone and I love it, but as I’m ambitious I want what’s the best and what’s best when you’re a coach is like in soccer: It’s better to work with Real Madrid or Barça or Manchester United or Paris Saint-Germain than with a club in the third division in Uzbekistan.

Q. So is Serena Barça or Real?

A. Ha! One or the other or both.

Q. But it must be affirming to know that you could make a difference at this level.