ChallengerClayGuayaquil2026-10-25 16:00

Ryan Nijboer v Mariano Kestelboim

The market

No published price yet

Percentages are the implied chance of winning with the bookmaker's margin removed.

Recent form

R. NijboerLWLWW

M. KestelboimLLWLL

Last five completed matches, most recent first.

Head to head

First career meetingNo previous matches between these two on record.

This season & this event

R. Nijboer

M. Kestelboim

47-24

47-22

Did not play

Lost R16 to F. A. Gomez

2026 record

2026 on clay

Here in 2025

Here in 2024

2-7

Did not play

Lost R16 to F. Coria

Ranking points fall off a year after they are earned, so a player who went deep here last year must match it or drop in the rankings. That shapes effort in a way the price does not always show.

The players

Ryan Nijboer

Netherlands

Mariano Kestelboim

Argentina

417

Netherlands

47–23

0–2

47–21

—

Ranking

Age

Country

2026 W/L

Titles

Hard

Clay

Grass

831

Argentina

2–6

—

2–6

—

Ranking, record and surface splits are for the most recent season on file. Height, weight and handedness are not published by our data provider.

R. Nijboer — last 10

With the pre-match price we recorded at the time.

Date	Event	Surface	Opponent	Their price	Market	Result
2026-10-12	Maia	Clay (Indoor)	B. Hassan	1.93	50%	LOST
Games in each set7-5 6-7 5-7 NijboerHassanPoints won50%50%Serve points won67%66%Return points won34%33%Games held16 of 1816 of 18Break points saved3 of 53 of 5Aces85Double faults31
2026-10-11	Maia	Clay (Indoor)	J. Barranco Cosano	1.85	52%	WON
Games in each set6-3 6-2 NijboerCosanoPoints won58%42%Serve points won69%50%Return points won50%31%Games held7 of 84 of 9Break points saved1 of 25 of 10Aces42Double faults25
2026-10-08	Braga	Clay	M. Moeller	3.06	69%	LOST
Games in each set3-6 3-6 NijboerMoellerPoints won44%56%Serve points won48%60%Return points won40%52%Games held4 of 97 of 9Break points saved1 of 67 of 9Aces44Double faults62
2026-10-06	Braga	Clay	M. McDonald	1.74	55%	WON
Games in each set6-1 4-6 6-3 NijboerMcDonaldPoints won53%47%Serve points won59%51%Return points won49%41%Games held10 of 137 of 13Break points saved6 of 915 of 21Aces47Double faults56
2026-10-05	Braga	Clay	B. Hassan	2.20	57%	WON
Games in each set6-3 6-3 NijboerHassanPoints won55%45%Serve points won58%49%Return points won51%42%Games held7 of 94 of 9Break points saved7 of 98 of 13Aces32Double faults17
2026-10-04	Braga	Clay	N. Hipfl	1.36	69%	WON
Games in each set5-7 7-5 6-1 NijboerHipflPoints won53%47%Serve points won59%53%Return points won47%41%Games held11 of 159 of 16Break points saved10 of 149 of 16Aces66Double faults47
2026-10-03	M25 Zaragoza	Clay	A. Ritschard	3.10	70%	LOST
Games in each set5-7 1-6 NijboerRitschardPoints won42%58%Serve points won58%72%Return points won28%42%Games held5 of 99 of 10Break points saved3 of 71 of 2
2026-10-02	M25 Zaragoza	Clay	N. Ifi	—	—	WON
Games in each set6-4 3-6 7-6 NijboerIfiPoints won52%48%Serve points won68%62%Return points won38%32%Games held13 of 1613 of 16Break points saved5 of 83 of 6
2026-10-01	M25 Zaragoza	Clay	P. Delage	1.39	68%	WON
Games in each set6-3 6-2 NijboerDelagePoints won62%38%Serve points won72%51%Return points won49%28%Games held10 of 105 of 8Break points saved4 of 41 of 4
2026-09-30	M25 Zaragoza	Clay	C. Stanke	1.01	96%	WON
Games in each set6-2 6-3 NijboerStankePoints won59%41%Serve points won71%56%Return points won44%29%Games held9 of 95 of 8Break points saved6 of 64 of 7

M. Kestelboim — last 10

With the pre-match price we recorded at the time.

Date	Event	Surface	Opponent	Score	Their price	Market	Result
2026-09-20	Buenos Aires 3	Clay	F. Tenti	RET	1.21	76%	LOST
Games in each set6-7 KestelboimTentiPoints won48%52%Serve points won62%64%Return points won36%38%Games held5 of 65 of 6Break points saved0 of 12 of 3Aces30Double faults11
2026-06-07	Lyon	Clay	I. Radulov		3.25	72%	LOST
Games in each set3-6 6-2 3-6 KestelboimRadulovPoints won49%51%Serve points won57%58%Return points won42%43%Games held8 of 139 of 13Break points saved6 of 113 of 7Aces36Double faults65
2026-06-01	Heilbronn	Clay	S. Nagal		5.80	84%	WON
Games in each set6-2 1-6 7-6 KestelboimNagalPoints won49%51%Serve points won61%64%Return points won36%39%Games held10 of 1311 of 14Break points saved5 of 80 of 3Aces63Double faults22
2026-04-14	Santa Cruz	Clay	M. Soto		7.00	87%	LOST
Games in each set5-7 1-6 KestelboimSotoPoints won41%59%Serve points won51%71%Return points won29%49%Games held5 of 99 of 10Aces28Double faults84
2026-04-05	Campinas	Clay	N. Rodrigues	RET	1.33	69%	LOST
Games in each set2-6 KestelboimRodriguesPoints won40%60%Serve points won50%73%Return points won27%50%Games held2 of 44 of 4Aces11Double faults31
2026-03-18	Asuncion	Clay	J. P. Varillas		3.95	76%	LOST
Games in each set0-6 4-6 KestelboimVarillasPoints won42%58%Serve points won49%64%Return points won36%51%Games held3 of 87 of 8Aces20Double faults00
2026-02-17	Tigre	Clay	J. B. Torres		3.00	69%	LOST
Games in each set4-6 3-6 KestelboimTorresPoints won43%57%Serve points won46%59%Return points won41%54%Games held4 of 97 of 10Break points saved4 of 91 of 4Aces00Double faults23
2026-01-27	Concepcion	Clay	F. Mena		2.75	66%	LOST
Games in each set4-6 4-6 KestelboimMenaPoints won47%53%Serve points won54%60%Return points won40%46%Games held6 of 108 of 10Break points saved2 of 60 of 2Aces25Double faults34
2026-01-26	Concepcion	Clay	M. Alves		2.64	65%	WON
Games in each set6-4 4-6 6-2 KestelboimAlvesPoints won52%48%Serve points won64%64%Return points won36%36%Games held13 of 1411 of 14Break points saved6 of 712 of 15Aces45Double faults85

Also at this event

Loedel v Rodriguez Claverie v Cordova Pino v Leite Galan v Arias Laaroussi v Salazar Magadan v Galarraga