Court speed index
WTA court speed index 2026: fastest and slowest tournaments
PickFinder Team•Updated:
Guangzhou is the fastest court on the WTA calendar with an ace index of 159, where 100 is the WTA average, and 4.1 aces per player per match. Merida is the slowest at 52 and 1.1 aces. Played in the last 3 days: Guangzhou (159), Hong Kong (108), Tokyo (98).
- Fastest: Guangzhou
- 159
- Slowest: Merida
- 52
- WTA aces per match
- 2.7
- WTA hold %
- 65.0%
Played in the last 3 days
WTA baselines by surface
52 WTA tournaments, fastest first
Using court speed index on a prop
Find the event
Look up this week's tournament in the table. Guangzhou is on hard with an ace index of 159.
Read the index
An index of 159 means players hit 59% more aces there than their own usual rates predict. It already allows for who entered.
Apply it to an ace line
A player averaging the WTA norm of 2.7 aces per match works out to about 4.3 at Guangzhou. Compare that with the line, then check the returner on the ace matchups page.
Use the hold number for games
Guangzhou runs +3.2 points against expected hold %. More holds mean fewer breaks and closer sets, which matters for break points, games won and total games. Today's line and the hit rate against it are in PickFinder.
How this is counted
Counts finished singles matches, Nov 2, 2025 to Nov 2, 2026, so each event appears about once. The ace index compares aces hit at an event with aces expected from who served and who returned there. Server and returner strength are fitted together with the events across all WTA matches, tour and lower level, so an entry list full of big servers doesn't make a court look fast. 100 is the WTA average. Hold vs expected does the same for breaks of serve and shows the difference in points of hold %. Aces per match and hold % are raw counts. Aces per match rises in best-of-five events, so those are marked. Retired matches and walkovers are left out. An event needs 15+ finished matches. This measures results, not the court itself: weather, altitude and balls all land in the number. It isn't the ITF court pace rating.
Court speed index FAQ
What is the fastest WTA court?
Guangzhou, with an ace index of 159, 4.1 aces per match and 66.7% hold over 48 matches.
What is the slowest WTA court?
Merida, with an ace index of 52, 1.1 aces per match and 53.7% hold over 42 matches.
Which Grand Slam plays fastest?
By ace index: Wimbledon 115, US Open 113, Australian Open 100, French Open 71.
How much do aces change between clay and grass?
WTA players average 2 aces per match on clay and 3.5 on grass, with 60.2% and 69.6% hold.
Why does the index differ from the raw ace count?
The raw count depends on who entered. The index compares aces with what those same servers and returners usually produce, so a field of big servers doesn't lift it. Guangzhou has a raw index of 142 and an adjusted index of 159.
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