The Decision Review System (DRS) in cricket explained
By Rohan Mehta, Cricket Analyst
The Decision Review System (DRS) in cricket explainedSports insights · Play responsiblyThe Decision Review System (DRS) lets a fielding captain or a batter challenge an on-field umpire's decision. The third umpire then checks it with replays, ball-tracking and edge-detection technology. Each team gets a limited number of unsuccessful reviews per innings, so choosing when to use one is part of the game.
How does a DRS review work?
After an on-field decision, the batter or the fielding captain signals a review with a 'T' shape. The third umpire checks the replays and technology, then tells the on-field umpire whether to keep or overturn the decision.
What technology does DRS use?
- Ball-tracking, which predicts the ball's path for LBW decisions.
- Edge detection such as UltraEdge, which uses sound to show whether the ball touched the bat.
- Slow-motion replays from multiple camera angles.
- Thermal imaging such as Hot Spot, in some series.
What does umpire's call mean?
When ball-tracking shows the ball only clipping the stumps or the line, the evidence isn't strong enough to overturn the original decision. The on-field call stands, and in that case the reviewing team doesn't lose its review.
How does DRS affect live betting?
Markets are usually suspended while a review is in progress, then reopen once the decision is final. A wicket overturned by DRS can swing session and match prices sharply, so avoid placing bets during a review.
Frequently asked questions
4 questions
Who can ask for a DRS review?
The batter who was given out, or the fielding captain when a not-out decision is given.
How many reviews does each team get?
Each team gets a limited number of unsuccessful reviews per innings, and the exact number depends on the format and competition rules.
Does a team lose a review on umpire's call?
No. When the result is umpire's call, the team keeps its review.
Are betting markets suspended during a review?
Usually yes, and they reopen at new prices once the decision is confirmed.
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