ITF rules govern competitive tennis—court dimensions, scoring, net height, equipment standards, and match protocols. Find rule breakdowns, common violations, and governing body references.
The number is 78 A regulation tennis court is 78 feet long, baseline to baseline. That single figure — 23.77 meters in the ITF's own units — is the anchor for almost every other tennis court dimension…
The common advice goes like this: a tennis service box is 21 feet long by 13.5 feet wide, and there are four of them, two per side, split by the centre service line. Coaches repeat it.