Closing Line Value Report — Saturday, March 21, 2026
March 21, 2026 brought 45 tennis matches to the Pinnacle closing line tracker, spanning 4 tournaments across hard and clay courts. Sharp money was active throughout the day, with 33 matches showing meaningful line movement before close. Below is a full breakdown of closing line value results, notable upsets, and market behavior for the day.
Biggest CLV Movers
Three matches stood out for Pinnacle line movement. T. Zink in Morelos saw the biggest shift at 18.2%, opening at 2.83 before closing at 3.46. The outcome, a win (6-4 6-3), confirmed the market's directional accuracy. Z. Bergs was the second mover, with an 16.2% change in Miami (2.07 → 1.78) — bettors who anticipated this move captured +16.2% CLV. The third mover, T. M. Etcheverry, drifted 15.0% in Miami against Z. Bergs.
Upsets and Surprise Results
March 21 produced 6 results where the underdog prevailed. The biggest came from Miami: S. Tsitsipas beat A. De Minaur 6-3 7-6 at 3.11 (De Minaur closed at 1.38). In Miami, Q. Halys overcame 3.14 odds to defeat A. Davidovich Fokina 7-6 6-4. These upsets saw little line movement before close — the market did not anticipate these outcomes. In such cases, underdog winners captured outcome value rather than closing line value; the market stayed with the favorite until the match started.
Tournament Final Recap
The most significant matches came at the semi-final stage of Zadar. A. Gea defeated K. Jacquet 6-7 7-6 6-1, with Pinnacle moving A. Gea's line 14.0% before close — a negative signal indicating the odds lengthened as the market moved against Gea. In the other semi-final, S. Travaglia overcame M. Dodig 7-6 6-3 (1.67 → 1.61). Both results set up a final between A. Gea and S. Travaglia.
CLV Summary — By the Numbers
Across all 45 matches, 71% of Pinnacle favorites won, 4.9% was the average absolute line movement, and 21 matches offered positive CLV to the favorite backer. The Challenger circuit accounted for 11% of the day's volume. Surface breakdown: 42 hard court matches, 3 clay, 0 grass.
Frequently Asked Questions — Closing Line Value in Tennis Betting
What is closing line value (CLV) in tennis betting?
Closing line value measures the difference between the odds you bet at and the final odds Pinnacle offered just before the match started. If you bet at 2.00 and the match closed at 1.80, you have positive CLV — you got a better price than the final market. CLV is widely considered the most reliable indicator of long-term profitability in sports betting, because Pinnacle's closing line incorporates all available sharp money and is the most accurate probability estimate available to the public.
Why does DeuceHQ use Pinnacle as the reference bookmaker?
Pinnacle is the industry benchmark for sharp money. Unlike most bookmakers, Pinnacle does not limit or ban winning bettors — they welcome sharp action. This means their odds reflect the true market consensus and are harder to beat. When Pinnacle's line moves significantly from open to close, it signals that informed bettors have entered the market. The vs mkt column (visible in the main tracker table on this page) compares Pinnacle's closing price to the average of other major bookmakers, showing where the sharpest market diverged from the wider betting market.
How is the CLV percentage calculated on this page?
CLV% measures the value of your bet relative to the closing line: ((odds you bet at − closing odds) / closing odds) × 100. Note that a positive result means the odds shortened from open to close (your opening price was higher than the closing price, i.e., you got a better price than the final market); a negative result means the odds drifted (lengthened). On this page we use Pinnacle's opening price as the reference — the CLV% shows what you would have captured if you had bet at open. All calculations use Pinnacle's official open and close prices sourced in real time.