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1991 ATP Surface Speed Ratings

My surface-speed metric uses ace rate--adjusted for the servers and returners in each match--to rate each tournament by surface speed. Thus, the number indirectly accounts for everything that influenced play: temperature, humidity, wind, balls, and of course the physical surface.

Ratings greater than 1 are faster than average. For example, a rating of 1.25 indicates that the players hit 25% more aces than they would have on a tour-average surface.

Click here for the most recent ratings, or

DateTournamentSurfaceAce%Surface Speed
22-Jul-1991HilversumClay5.9%1.62
04-Feb-1991San FranciscoCarpet6.8%1.50
23-Sep-1991BaselHard10.3%1.48
11-Feb-1991BrusselsCarpet10.6%1.44
12-Nov-1991Tour FinalsCarpet15.7%1.37
04-Nov-1991BirminghamCarpet8.9%1.30
14-Oct-1991ViennaCarpet7.0%1.28
04-Nov-1991Sao PauloHard5.3%1.27
08-Jul-1991NewportGrass13.4%1.25
07-Oct-1991Tokyo IndoorCarpet10.8%1.24
24-Jun-1991WimbledonGrass9.2%1.23
04-Mar-1991CopenhagenCarpet7.7%1.21
28-Oct-1991Paris MastersCarpet9.7%1.20
07-Oct-1991Tel AvivHard13.8%1.20
14-Oct-1991LyonCarpet8.1%1.18
21-Oct-1991GuarujaHard5.5%1.17
21-Oct-1991Stockholm MastersCarpet9.9%1.17
17-Jun-1991ManchesterGrass8.1%1.16
22-Apr-1991SingaporeHard4.7%1.15
30-Sep-1991AthensClay3.0%1.15
05-Aug-1991Cincinnati MastersHard9.5%1.15
10-Jun-1991Queen's ClubGrass6.5%1.14
18-Feb-1991Stuttgart IndoorCarpet7.5%1.14
23-Sep-1991BrisbaneHard5.0%1.13
07-Oct-1991BerlinCarpet5.8%1.12
25-Feb-1991RotterdamCarpet8.4%1.11
26-Aug-1991US OpenHard7.4%1.11
04-Mar-1991Indian Wells MastersHard6.9%1.11
12-Aug-1991New HavenHard7.5%1.10
31-Dec-1990AdelaideHard6.5%1.10
18-Feb-1991MemphisHard7.7%1.08
04-Nov-1991MoscowCarpet7.3%1.08
04-Feb-1991GuarujaHard6.7%1.08
01-Apr-1991OrlandoHard9.4%1.07
08-Jul-1991GstaadClay7.7%1.06
29-Jul-1991KitzbuhelClay5.3%1.06
08-Apr-1991Tokyo OutdoorHard6.9%1.04
11-Feb-1991PhiladelphiaCarpet7.0%1.02
09-Sep-1991GenevaClay3.7%1.00
30-Sep-1991ToulouseHard8.3%1.00
09-Sep-1991BrasiliaCarpet5.7%1.00
07-Jan-1991AucklandHard5.7%1.00
15-Jul-1991WashingtonHard5.8%1.00
15-Jul-1991Stuttgart OutdoorClay5.8%0.99
07-Jan-1991Sydney OutdoorHard6.6%0.99
22-Jul-1991Canada MastersHard6.9%0.98
25-Feb-1991ChicagoCarpet6.4%0.98
29-Jul-1991Los AngelesHard8.4%0.98
15-Mar-1991Miami MastersHard6.4%0.97
12-Aug-1991IndianapolisHard7.1%0.96
30-Sep-1991Sydney IndoorHard8.9%0.96
23-Sep-1991PalermoClay4.5%0.96
04-Feb-1991MilanCarpet7.5%0.95
10-Jun-1991RosmalenGrass9.0%0.93
09-Sep-1991BordeauxHard6.4%0.93
28-Oct-1991BuziosHard4.0%0.90
31-Dec-1990WellingtonHard5.2%0.89
10-Jun-1991FlorenceClay3.5%0.89
14-Jan-1991Australian OpenHard5.8%0.88
19-Aug-1991SchenectadyHard6.4%0.85
01-Apr-1991Hong KongHard6.4%0.84
29-Apr-1991TampaClay5.4%0.83
08-Apr-1991BarcelonaClay3.8%0.83
06-May-1991CharlotteClay5.6%0.82
17-Jun-1991GenovaClay2.9%0.80
29-Apr-1991MunichClay4.0%0.78
19-Aug-1991Long IslandHard5.5%0.76
29-Jul-1991San MarinoClay2.3%0.75
27-May-1991Roland GarrosClay4.8%0.68
29-Apr-1991MadridClay4.4%0.67
20-May-1991BolognaClay4.1%0.65
08-Jul-1991BastadClay3.0%0.61
15-Apr-1991SeoulHard3.1%0.61
06-May-1991Hamburg MastersClay3.5%0.61
13-May-1991Rome MastersClay3.3%0.61
13-May-1991UmagClay3.4%0.60
05-Aug-1991PragueClay2.9%0.59
15-Apr-1991NiceClay2.9%0.59
01-Apr-1991EstorilClay3.0%0.57
22-Apr-1991Monte Carlo MastersClay3.1%0.52