Second-round previews from the Sioux Falls Challenger (indoor hard), with form, serve and return numbers and a full Tale of the Tape for every match. Times are as listed by the tournament schedule and may move with the order of play.
Max Hans Rehberg vs Stefan Kozlov
🧠 Form & Context
Max Hans Rehberg
- 🔥 Ranked No. 264 at 23, 8–2 in his last 10, through after beating Shick in the first round.
- 🚀 The stronger server: 68.3% on first-serve points, 51.9% on second and 67.4% of first serves in.
- 🔒 Saves 60.6% of break points, and 62% in recent matches.
- 📈 Has won 66% of his recent matches.
- ⚠️ Weak on return: 31.1% of points won against the first serve.
Stefan Kozlov
- 📉 Ranked No. 284 at 28, only 3–7 in his last 10, through after beating Cassone.
- 🔁 The better returner: 34.3% against the first serve and 53.1% against the second.
- 🏆 Has won 60% of deciding sets over his career.
- ⚠️ Wins only 48.4% of his second-serve points.
- ⚠️ Has won just 44% of his recent matches.
🔍 Match Breakdown
A first meeting. Rehberg is the 1.44 favourite and comes in with much the better form: 8–2 in his last 10 against Kozlov's 3–7.
Rehberg leads on every serving line. He lands more first serves (67.4% vs 61.0%), wins more behind both serves (68.3% vs 66.3% and 51.9% vs 48.4%) and saves more break points (60.6% vs 57.5%).
Kozlov is the better returner, with 34.3% vs 31.1% against the first serve and 53.1% vs 51.4% against the second. On break points converted, though, Rehberg is slightly ahead (44.2% vs 42.3%).
Kozlov's best card is his record in tight finishes: 60% of deciding sets over his career against Rehberg's 49%.
Rehberg has the serve and the form, and his price looks fair. Kozlov needs to keep it close and get it to a third set.
📊 Tale of the Tape
| Metric | Rehberg | Kozlov |
|---|---|---|
| Ranking | 264 | 284 |
| Age | 23 | 28 |
| Last 10 | 8–2 | 3–7 |
| Head-to-head | 0 | 0 |
| First serves in | 67.4% | 61.0% |
| 1st-serve points won | 68.3% | 66.3% |
| 2nd-serve points won | 51.9% | 48.4% |
| Break points saved | 60.6% | 57.5% |
| Break points converted | 44.2% | 42.3% |
| Return points won (career) | 39% | 42% |
| Tiebreak win % | 53% | 47% |
| Deciding-set win % (career) | 49% | 60% |
| Best-of-3 win % | 57% | 57% |
Sebastian Dominko vs Valentin Royer
🧠 Form & Context
Sebastian Dominko
- 🔥 Ranked No. 554 at 23, left-handed, 7–3 in his last 10.
- 🚀 A big first serve: 73.2% of first-serve points won, and 77% in recent matches.
- 📈 Has won 77% of his recent matches.
- 🏆 Wins 64% of tiebreaks over his career.
- ⚠️ Very limited data on him at this level, and he wins only 46.7% behind his second serve.
Valentin Royer
- 📊 Ranked No. 117 at 25, 4–6 in his last 10.
- 🚀 Wins 71.0% on first-serve points and a solid 52.1% on second.
- 🔒 Saves 61.7% of break points.
- 🏆 Wins 63% of best-of-three matches over his career.
- ⚠️ Has won only 45% of his recent matches and 42% of deciding sets this season.
🔍 Match Breakdown
A first meeting. Royer is the 1.40 favourite, more than 400 ranking places above his opponent.
This should be a serve-dominated match. Neither player returns well: both win around 31% of points against the first serve.
Dominko has the bigger first serve (73.2% vs 71.0%), but Royer is clearly stronger behind the second (52.1% vs 46.7%) and saves slightly more break points (61.7% vs 60.6%).
The form points the other way. Dominko has won 77% of his recent matches to Royer's 45%, and he is 7–3 in his last 10 against 4–6.
Royer's ranking and second serve explain the price. Dominko's form and tiebreak record (64% vs 52%) could make this much closer, but we have very little data on him at this level.
📊 Tale of the Tape
| Metric | Dominko | Royer |
|---|---|---|
| Ranking | 554 | 117 |
| Age | 23 | 25 |
| Last 10 | 7–3 | 4–6 |
| Head-to-head | 0 | 0 |
| First serves in | 61.4% | 62.2% |
| 1st-serve points won | 73.2% | 71.0% |
| 2nd-serve points won | 46.7% | 52.1% |
| Break points saved | 60.6% | 61.7% |
| Break points converted | 41.3% | 42.7% |
| Return points won (career) | 38% | 39% |
| Tiebreak win % | 64% | 52% |
| Deciding-set win % (career) | 63% | 58% |
| Best-of-3 win % | 61% | 63% |
Liam Draxl vs Daniil Ostapenkov
🧠 Form & Context
Liam Draxl
- 🔥 Ranked No. 194 at 24, 7–3 in his last 10.
- 🔒 Saves 60.9% of break points.
- 🎯 Lands 65.3% of first serves.
- 🏆 Has won 59% of deciding sets and 56% of tiebreaks over his career.
- ⚠️ Wins only 49.7% behind his second serve.
Daniil Ostapenkov
- 📊 Ranked No. 546 at 23, 6–4 in his last 10.
- 🚀 Matches his opponent on first serve: 69.3% of points won.
- 📈 Has won 59% of his recent matches and 67% of deciding sets this season.
- ⚠️ Saves only 54.8% of break points.
- ⚠️ Has won 52% of deciding sets over his career.
🔍 Match Breakdown
A first meeting. Draxl is the 1.22 favourite.
On serve and return the numbers are almost identical. Both win about 69% behind the first serve, and on return the gaps are within half a point (34.4% vs 34.6% against the first serve, 53.1% vs 53.5% against the second).
The difference is under pressure. Draxl saves 60.9% of break points to 54.8%, and he has the better career record in tiebreaks (56% vs 50%) and deciding sets (59% vs 52%).
Recent form is close (61% vs 59% of matches won), and both have won around two-thirds of their deciding sets this season.
Draxl is the deserved favourite because of how he handles big points. The rest of the numbers say this could be closer than 1.22 suggests.
📊 Tale of the Tape
| Metric | Draxl | Ostapenkov |
|---|---|---|
| Ranking | 194 | 546 |
| Age | 24 | 23 |
| Last 10 | 7–3 | 6–4 |
| Head-to-head | 0 | 0 |
| First serves in | 65.3% | 62.0% |
| 1st-serve points won | 69.4% | 69.3% |
| 2nd-serve points won | 49.7% | 49.0% |
| Break points saved | 60.9% | 54.8% |
| Break points converted | 46.0% | 45.5% |
| Return points won (career) | 42% | 42% |
| Tiebreak win % | 56% | 50% |
| Deciding-set win % (career) | 59% | 52% |
| Best-of-3 win % | 64% | 65% |
Mitchell Krueger vs Darwin Blanch
🧠 Form & Context
Mitchell Krueger
- 📊 Ranked No. 351 at 32, 5–5 in his last 10, through after beating Andrade in the first round.
- 🎯 Lands 62.2% of first serves and wins 50.6% on second-serve points.
- 🔒 Saves 61.3% of break points.
- ⚠️ Has won only 42% of his recent matches.
- ⚠️ Wins just 45% of tiebreaks over his career.
Darwin Blanch
- 🔥 Ranked No. 144 at 19, left-handed, 7–3 in his last 10, through after beating Gorzny.
- 🚀 The bigger first serve: 70.5% of points won, and 74% in recent matches.
- 🔒 Has saved 63% of break points in recent matches.
- 🏆 Wins 60% of tiebreaks over his career.
- ⚠️ Lands only 60.4% of first serves.
🔍 Match Breakdown
Their third meeting in a year, and both earlier ones were indoors. Krueger won 6–7 6–4 6–1 in Knoxville last November, and Blanch won 6–3 7–6 in Champaign a few days later. Blanch is the 1.18 favourite.
Expect plenty of holds. Neither player returns well: both win about 31% of points against the first serve and about 50% against the second.
Blanch has the bigger first serve (70.5% vs 69.1%) and has been even stronger on it recently (74% vs 68%). Krueger lands slightly more first serves (62.2% vs 60.4%), and on break points saved they are level.
The tiebreak record matters here, and it clearly favours Blanch: 60% vs 45%. He also has the better recent form (55% vs 42% of matches won).
Krueger has beaten Blanch before and will not be overawed. Blanch's serve, form and tiebreak record make him a deserved favourite in a match likely to be settled by a handful of points.
📊 Tale of the Tape
| Metric | Krueger | Blanch |
|---|---|---|
| Ranking | 351 | 144 |
| Age | 32 | 19 |
| Last 10 | 5–5 | 7–3 |
| Head-to-head | 1 | 1 |
| First serves in | 62.2% | 60.4% |
| 1st-serve points won | 69.1% | 70.5% |
| 2nd-serve points won | 50.6% | 50.2% |
| Break points saved | 61.3% | 61.1% |
| Break points converted | 40.9% | 41.7% |
| Return points won (career) | 38% | 38% |
| Tiebreak win % | 45% | 60% |
| Deciding-set win % (career) | 46% | 52% |
| Best-of-3 win % | 52% | 58% |
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