Niels Visker vs Guilherme Valdoleiros — Porto Qualifying Round of 32

Porto · CHALLENGER · Qualifying Round of 32
NED
Niels Visker
#426ATP
1371ELO
1262Clay ELO
24 yrs · 191 cm · Right-handed
Last 10 · pre-match
WWLLWWWLWL
2 — 0
Sets
Sunday, 30 August 2026 ·
clay
Central · 1st on
PORWC
Guilherme Valdoleiros
27 yrs · Right-handed
Last 10 · pre-match
LLWLWWLLWW
Visker N.
6-2 6-0
Valdoleiros G.
Visker N.
662
Valdoleiros G.
200

Niels Visker defeated Guilherme Valdoleiros in the Q32 of the Porto clay tournament. The match ended with a score of 6-2, 6-0 in favor of Visker. Visker hit 3 aces and 2 double faults, while converting 45% of break points and securing 5 service breaks, compared to Valdoleiros' 0 aces, 6 double faults, 0% break point conversion, and 0 service breaks.

Generated automatically from Umpiry match data.

Key context

Head to head

No previous meetings on record.

Statistics

This season
Visker N.Valdoleiros G.
1st serve in·Slight edge
59%
68%
1st serve points won·Clear edge
80%
58%
2nd serve points won·Slight edge
55%
45%
Service points won·Clear edge
70%
54%
Return points won·Clear edge
32%
47%
Break points saved·Dominant
76%
30%
Aces / match·Dominant
10.7
2.0
Double faults / match·Clear edge
3.4
2.0

Averages over each player's completed matches in the selected window (20 vs 2). ATP, WTA & Challenger.

Win Probability

Pre-match · updated 08:50 UTC
Visker N.86%
Valdoleiros G.14%
Toss-up
50–58%
Slight edge
58–67%
Clear favourite
67–80%
Strong favourite
80%+

Strong favourite · Visker N. heavily favoured

Calibrated model · 63% favourite accuracy (2025–26, out-of-sample). Probability is a statistical estimate, not a certainty. How it works.

Umpiry Score

Pre-match
Visker N.
5.5
Slight disadvantageUmpiry ScorePartial · surface data limited
Valdoleiros G.
4.2
Heavy underdogUmpiry ScorePartial · surface data limited
Form & Matchup
5.0No prior meetings
H2H
5.0No prior meetings
4.24 of last 10 on clay
Surface form
0.00 of last 6 on clay
0.0Lost last 2
Win streak
0.0Lost last 7
Fatigue & Travel
Surface transition
6.0Hard → Clay
Context
5.0Didn't play here last year
Defending pts
5.0Didn't play here last year

The Umpiry Score combines match-context factors — matchup, form, fatigue, travel and motivation — into a single 0–10 score, updated daily. Read how it works.

Freshness

Recent load
Visker N.Valdoleiros G.
Freshness·Dominant
59
93

Visker N.: 1 day rest · 3 matches, 74 games (7d) · Valdoleiros G.: 3 days rest · 1 match, 14 games (7d). Higher means fresher. About

Conditions

Court speed
Slowlow bounce, long rallies
SlowFast
Weather
22°CMainly clear
Wind 13 km/hHumidity 60%

Draw