Another issue raised over the weekend was when a roof could be reopened during a match. It was closed for the start of Djokovic’s and Nadal’s match because of darkness and it stayed closed when they resumed on a sunny Sunday because Djokovic declined to approve its reopening. Lewis said there was no written rule, just a protocol, but he intends to clarify the policy.

“The referees’ office were unanimous in saying the match must be played under a roof unless both players agree,” he said. “I think we will clarify it.”

As for the fifth-set tiebreaker, Lewis said it was tempting to think that the clamor is mostly centered on Isner, the 6-foot-10 American who is the common denominator in the ultramarathon matches. But it is not just about Isner.

Since 2000, there have been 28 men’s matches that have had fifth sets stretching past the 20-game mark at Wimbledon. Only once did the winner go on to win more than one more round. In 2016, Sam Querrey defeated Lukas Rosol with a 12-10 fifth set in the first round, and then reached the quarterfinals. In 2009, Federer defeated Andy Roddick 5-7, 7-6 (6), 7-6 (5), 3-6, 16-14 in the final but did not have to play another match.

So what makes sense based on that data? The United States Open’s fifth-set tiebreaker comes at 6-6, but the best compromise for the other three Slams might be 9-9 rather than the 12-12 that Anderson, Isner and others have suggested.

That would preserve some of the advantage-set tradition and yet set a finish line that would give the winner a chance going forward.