GUIDES · BETSLIP DOCTOR
Why does a standard ICC men’s ODI use one selected ball after the 34th over?
In the standard ICC men’s ODI conditions, two new balls are used from opposite ends in alternating overs through over 34. At the end of that over, the fielding side picks one of that used pair for the rest of the innings; the other goes into the replacement supply. That is a choice between the two balls already in play, not a third new ball. A separate one-ball exception applies when the match has been reduced to 25 overs or fewer per side before the first innings begins.
For Cricket viewers trying to identify why the ball in use changes after the 34th over · Updated
The choice comes from the pair already in use
For a stipulated ordinary 50-over ODI, picture the two balls as A and B. Ball A is used from one end and B from the other, in alternate overs through over 34. At the end of over 34, the fielding team selects A or B to continue for the remaining overs.
The ball not selected is added to the replacement supply for that innings. This scheduled selection is different from an umpire replacing a lost or unfit ball; a replacement does not automatically mean a new ball.
A separate exception is set before the first innings
The standard ODI conditions give each team one new ball for its innings when the match has been reduced to 25 overs or fewer per side before the first innings commences. The timing is part of the rule: this is not a general statement that every later rain reduction switches an innings to one new ball.
The exception changes how many new balls are supplied for each innings. It does not describe how to calculate a revised quota or a target.
The standard T20I rule uses one new ball per innings
The standard ICC men’s T20I conditions use one new ball at the start of each innings. That differs from the ordinary ODI pair-and-selection arrangement.
These are format-specific playing conditions. Do not carry the ODI rule into another format or competition without checking the document that governs that match.
Check the series edition before applying it
This explanation uses the October 2026 standard ICC men’s ODI and T20I documents. The ICC says the revised conditions apply to international series starting on or after 1 October 2026; a series already underway keeps its earlier regulations. That edition date does not establish when each individual clause was first introduced.
A particular fixture may also have event-specific conditions or an addendum. Check those documents before applying this explanation to a real match.
A fictional ODI with two named balls
In a stipulated ordinary 50-over ODI, call the balls A and B. Ball A is used from one end and B from the other, in alternate overs through over 34. At the end of that over, the fielding side selects B to continue, and A joins the replacement supply; no brand-new third ball appears. Separately, suppose a different match is already set at 25 overs per side before the first innings starts: each team has one new ball for its innings. In a standard T20I, each innings starts with one new ball. These examples do not predict how ball age affects scoring or play.
Related questions
Does a brand-new third ball arrive after over 34?
No. The fielding side chooses one of the two balls already used in that ODI innings. The other enters the replacement supply.
Does any rain reduction trigger the one-ball exception?
The cited ODI exception is limited to a match reduced to 25 overs or fewer per side before the first innings begins. It should not be generalized to every interruption.