Tennis · Challenger Porto · 30/08, 11:00
Prediction: Niels Visker vs Guilherme Valdoleiros
Team pages: Niels Visker · Guilherme Valdoleiros
Prediction summary
Winner
Niels Visker
Guilherme Valdoleiros
Estimated games
20.4
Recent form · 10 last
Niels Visker
5-5 (W-L)
Guilherme Valdoleiros
3-7 (W-L)
Our model (Elo) vs Market
Rating Elo · Niels Visker 1492 · Guilherme Valdoleiros 1471
| Niels Visker | Guilherme Valdoleiros | |
|---|---|---|
| Our model | 53% | 47% |
| Market | 88% | 12% |
The bar above blends our model with the market: where our probability diverges most from the odds is where the model sees the widest gap.
Match keys
- Note: Niels Visker makes many double faults (4/match).
Statistics
| Niels Visker | Guilherme Valdoleiros | |
|---|---|---|
| Win % | 40% | 40% |
| Win % · Clay | 50% (8) | – |
| Sets (G-P) | 0.9-1.3 | 0.9-1.3 |
| Games (G-P) | 10.1-11.7 | 8.1-9.4 |
| Aces | 7.6 | 1 |
| Double faults | 4 | 1.7 |
| 1st serve % | 76.8% | 58% |
| Break % | 30.5% | 41.4% |
Estimated total games (ours)
20.4
Last 10 matches played
Last matches of each player (sets and games). W = win, L = loss. Common opponents to both are in blue.
Niels Visker
Swipe the table sideways →
| Date | Opponent | Sets | Games | Res. |
|---|---|---|---|---|
| 26/07 | Manuel Mazza Challenger San Marino · Clay |
0-2 | 9-13 | L |
| 22/07 | Gauthier Onclin Challenger Tampere · Clay |
0-2 | 8-13 | L |
| 21/07 | Alex Barrena Challenger Tampere · Clay |
2-0 | 12-5 | W |
| 20/07 | Patrik Niklas-Salminen Challenger Tampere · Clay |
2-0 | 13-9 | W |
| 19/07 | Vesa Ahti Challenger Tampere · Clay |
2-1 | 16-13 | W |
| 16/07 | Ryan Nijboer Challenger Bunschoten · Clay |
0-2 | 5-12 | L |
| 14/07 | Tomas Barrios Vera Challenger Bunschoten · Clay |
2-0 | 12-8 | W |
| 07/07 | Ivan Ivanov Challenger Nottingham · Grass |
0-2 | 9-13 | L |
| 23/06 | Alexander Vasilev Challenger Plovdiv · Clay |
0-2 | 6-13 | L |
| 15/06 | Oliver Crawford Challenger Dublin · Grass |
1-2 | 11-18 | L |
Guilherme Valdoleiros
Swipe the table sideways →
| Date | Opponent | Sets | Games | Res. |
|---|---|---|---|---|
| 15/07 | Iker Urribarrens M15 Castelo Branco |
0-2 | 5-12 | L |
| 13/07 | Daniel Marincas M15 Castelo Branco |
2-0 | 12-4 | W |
| 24/06 | Daniil Ostapenkov M25 Porto |
0-2 | 8-12 | L |
| 23/06 | Oscar Andres Martinez de Freitas M25 Porto |
2-1 | 10-10 | W |
| 15/06 | Zach Stephens M25 Lourinha · ~Hard |
0-2 | 4-12 | L |
| 05/05 | Jose Dominguez Alonso M25 Loule · ~Hard |
0-2 | 7-12 | L |
| 04/05 | Joao Mendes M25 Loule · ~Hard |
2-0 | 12-4 | W |
| 29/04 | John Echeverria M25 Quinta do Lago · ~Hard |
0-2 | 0-12 | L |
| 27/04 | Ids Waterbolk M25 Quinta do Lago · ~Hard |
2-0 | 13-6 | W |
| 20/04 | Hugo Maia M15 Sanxenxo · ~Hard |
1-2 | 10-10 | L |
Frequently asked questions
Who is the favourite in Niels Visker vs Guilherme Valdoleiros?
Our model gives 72% to Niels Visker, using surface Elo on clay.
What is the prediction based on?
On an Elo model by surface (clay) adjusted for opponent quality, compared with the market odds.

