S
Stefan Kozlov
USA · Active 2013–2026
#259
Ranking
#103
Best Rank
258–230
Win–Loss
52.9%
4–6
Last 10
11–9
Last 20
Record by Surface
Hard
195–16354.5%
Clay
48–4352.7%
Grass
15–2438.5%
Career Averages
1st Serve %61.4%
1st Srv Pts Won66.3
2nd Srv Pts Won48.0
BP Saved %57.1%
BP Converted %41.8%
Return Pts Won41.1
Avg Aces2.8
Avg DFs4.0
Serve Rating243.2
Return Rating158.6
Career Splits
| W-L | Win% | SPW | RPW | DR | 1st% | BPS% | BPC% | |
|---|---|---|---|---|---|---|---|---|
| Surface | ||||||||
| Hard | 195–163 | 54.5% | 59.6% | 41.2% | 1.01 | 61.5% | 57.4% | 41.6% |
| Clay | 48–43 | 52.7% | 57.5% | 42.8% | 1.01 | 60.3% | 55.5% | 44.6% |
| Grass | 15–24 | 38.5% | 59.8% | 35.8% | 0.93 | 62.7% | 58.7% | 35.9% |
| Tournament Level | ||||||||
| Other | 254–217 | 53.9% | 59.4% | 41.2% | 1.01 | 61.5% | 57.1% | 42.1% |
| Masters | 4–13 | 23.5% | 54% | 38% | 0.87 | 57.2% | 57.3% | 33.6% |
| Round | ||||||||
| Semi-Finals | 11–7 | 61.1% | 61.4% | 41% | 1.04 | 62.9% | 62.3% | 38.8% |
| Quarter-Finals | 18–28 | 39.1% | 56.9% | 39.8% | 0.95 | 62.1% | 54.1% | 39.1% |
| vs Rank | ||||||||
| vs Top 10 | 0–4 | 0% | 49.1% | 26.7% | 0.67 | 65.7% | 47.7% | 36.4% |
| vs Top 11–50 | 3–10 | 23.1% | 55.9% | 35.5% | 0.87 | 64% | 51.3% | 35.9% |
| Format | ||||||||
| Best of 3 | 258–229 | 53% | 59.2% | 41.2% | 1.01 | 61.3% | 57.1% | 41.8% |
| Best of 5 | 0–1 | 0% | 69% | 32.3% | 1.02 | 69.7% | 57.1% | 66.7% |