Show me the second serve number and keep the rest

If you can only see one statistic from a completed match, second serve points won will tell you more than any other line.

Hand me a match summary with everything blanked out except one row and I will take second serve points won. Not aces, not winners, not the first serve percentage, and certainly not break points converted, which is the number broadcasters love and which is mostly noise.

The reason is that the second serve is the only shot in tennis a player is compelled to hit under a known constraint. There is no choice to avoid it. You cannot play around it tactically the way you can hide a weak backhand. And it sits at the junction of everything that matters, because winning those points requires a serve good enough not to be attacked, the movement to recover into the rally, and the groundstrokes to survive a point you started at a disadvantage.

Break point conversion, by contrast, is a small sample of an outcome. A professional might face a couple of hundred break points in a season, split across surfaces and opponents, and the year to year swing in that percentage is large enough that the rankings of clutch players reshuffle every twelve months. People treat it as character. It behaves like a coin.

There is a structural argument too. Sets are decided by breaks, breaks are decided by return games, and the vast majority of return games that get broken get broken on second serve points, because that is where the returner has a realistic chance to start the rally on level terms or better. Everything upstream of that is preamble.

The counter is that the number can be gamed by serving a slow safe second ball and being an excellent baseliner, which is true, and it does not bother me. If a player can hold at a high rate with a modest second serve because his rally game is good enough to overcome the disadvantage, that is a genuine strength and the number correctly rewards it.

What I would drop from broadcast is the pressure framing entirely. The graphic that pops up at deuce showing a player's break point record over the last eighteen months is presented as insight and is close to meaningless at that sample size.

Put the second serve number on the screen instead. Half the arguments in the commentary box would end in about a set.