Yes, I would imagine surely that Naomi and her coach(es) have looked for common themes in days and matches when she has served very well and when her serve has been well off its best. The intention then would be to seek to control the controllables in say her match prep that seem associated with good days and work round the less controllables, be it weather or whatever. For when that serve is on fire she can really trouble highly ranked players.

Plus, of course, more practice generally brings more consistency, with never neglecting to try to make an asset / weapon even moreso as well as working on weaknesses. I would imagine that such as Isner and Karlovic have practiced their already potent serves a heck of a lot over the years to bring their consistency, often high first serve in ratios suggesting this. It may not be great viewing for many, but for the player it makes eminent sense. 'Free points' ? - get as many as you can. People saying the player you beat was the 'better player' ? - you won the points and games that mattered, smile and move on.

Certainly Fitzy seemed to emphasise more than seemingly others previously just how much the serve could achieve for her.

Hev has started by holding her serve first game. The "crowd" is barely into double figures...