Stefan Kozlov #374 def. Johannes Haerteis #305

5-0 (ret.)

The match ended when Johannes Haerteis retired.

Stefan Kozlov defeated Johannes Haerteis 5-0 RET after Johannes Haerteis retired in the 2021 Delray Beach Open first qualifying round on hard courts.

Match Information

Match Statistics

StatStefan KozlovJohannes Haerteis
Serving
AcesServes that land in and are not touched by the returner.
10
Double faultsService points lost by missing both first and second serve.
03
First serve %Percentage of service points where the first serve landed in.
80.0%44.4%
First serve points won %Percentage of points won after making a first serve.
75.0%25.0%
Second serve points won %Percentage of second-serve points won, including points lost through double faults.
75.0%0.0%
Break points saved %Percentage of break points won by the server.
100.0%0.0%
Service points won %Percentage of all points won while serving.
75.0%11.1%
Returning
Break points converted %Percentage of break-point chances won by the returner.
100.0%0.0%
Return points won %Percentage of all points won while returning.
88.9%25.0%
Overall
Total points won %Percentage of all completed points won.
79.3%20.7%
Match Serve+This match’s service points won percentage minus the tour’s season average, in percentage points. Zero is average; +5 means five points above average. Match-weighted available stats; no opponent adjustment.
+11.7-52.2
Match Return+This match’s return points won percentage minus the tour’s season average, in percentage points. Zero is average; +5 means five points above average. Match-weighted available stats; no opponent adjustment.
+52.2-11.7

* Match Serve+ and Match Return+ compare this match with the ATP 2021 average from available match stats. Zero is average; +5 means five percentage points above average. No opponent adjustment.

Player Comparison

FieldStefan KozlovJohannes Haerteis
Country USA GER
Birth dateFeb 1, 1998—
Age22—
Height183 cm196 cm
HandednessRight-HandedLeft-Handed
Backhand style——
Ranking (entering)374305
Ranking points (entering)110153
Elo (entering)1,5141,465
Current career W-L9–26—
Current career earnings$1,137,283$119,206
Pre-match H2H
Stefan Kozlov #374 0 – 0 Johannes Haerteis #305

No prior-path match data is available for this tournament stage.