Adolfo Daniel Vallejo and Alvaro Guillen Meza will clash against each other in the semifinal of the Guayaquil Challenger for the 5^th time in their career. They are scheduled to play on Saturday at 2:00 pm on CANCHA CENTRAL. Here the head to head stats and relative prediction.

Prediction, odds and live streaming

The pick for Tennis Tonic is Adolfo Daniel Vallejo who should win in 3 sets.

As per the initial odds, Adolfo Daniel Vallejo is the pick to win this match.
Adolfo Daniel Vallejo -> 1.59
Alvaro Guillen Meza -> 2.18

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Prediction and head to head Adolfo Daniel Vallejo vs. Alvaro Guillen Meza

This will be the 5^th time that Adolfo Daniel Vallejo and Alvaro Guillen Meza face off. The head to head is 3-1 for Daniel Vallejo (see full H2H stats), 3-1 on clay.

The last time that they locked horns, Daniel Vallejo won 2-6 6-3 6-4 in the 2^nd round in the Montevideo Challenger back in November 2025.

Adolfo Daniel Vallejo

Ranked no. 163 (career-high), Adolfo reached the semifinal after beating Lucio Ratti 6-2 6-1, Luis David Martinez 6-2 6-3 and Luciano Emanuel Ambrogi 6-2 6-4.

In the quarter, Adolfo had a good straight sets win against Emanuel Ambrogi (6-2 6-4). During the match, Daniel Vallejo scored 57 points vs Emanuel Ambrogi’s 43. Daniel Vallejo was pretty aggressive to blast 24 winners.

Regarding the service games, Daniel Vallejo scored just 1 ace in the match and he committed only 1 double fault. Adolfo Daniel Vallejo lost the serve twice and he saved 3 break points. Furthermore, Daniel Vallejo put 74% of his first serves in, winning 65% (24/37) of the points behind his 1st serve and 62% (8/13) on the 2nd serve. Daniel Vallejo broke Emanuel Ambrogi 5 times after converting 71% of his break points (5/7).

Overall Performance in this tournament

Adolfo hasn’t dropped yet a set in this event to win 59% of the points he played.

Daniel Vallejo has a winning record in the last 6 years having won 58% of his matches (137-99). 47-24 on clay in 2025. Talking about his performance on the same surface of this tournament, Daniel Vallejo has a compiled104-72 win-loss record in the last 6 years on clay.

His best result of the year was conquering the title the Curitiba Challenger where he defeated Pedro Boscardin Dias in the final 6-3 7-5.

Daniel Vallejo has an overall 48-28 win-loss record in 2025, 47-24 on clay (See FULL STATS).

Previously in the Guayaquil Challenger

The Paraguayan has never competed in this tournament before.

Alvaro Guillen Meza

Ranked no. 197, the Ecuadorian reached the semifinal after defeating Emilio Camacho 6-2 6-3, Hernan Casanova 6-1 3-0 ret. and Facundo Mena 6-1 6-4.

In the quarter, The Ecuadorian had a good straight sets win against Mena (6-1 6-4). During the match Guillen Meza scored 57 points vs Mena’s 37. Guillen Meza was extremely aggressive to blast 30 winners.

About the serving games, Guillen Meza couldn’t to score even 1 ace for the entire match and he committed only 3 double faults. Alvaro Guillen Meza was pretty effective on serve to win 81% (30/37) of his 1st serve and 58% (7/12) on the second serve. This was the main reason for not conceding a single break during the match. Guillen Meza broke Mena 3 times after converting 75% of his break points (3/4).

Overall Performance in this tournament

Guillen Meza hasn’t dropped yet a set in the tournament to win 61% of the points he played.

His best result of the year was winning the title the Santos Challenger where he overcame Matheus Pucinelli De Almeida in the final 6-3 7-6(12).

The Ecuadorian has an aggregate 46-28 win-loss record in 2025, 46-26 on clay (See FULL STATS)

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H2H Performance in the tournament (main draw)

Matches, sets, games and points

Points	Daniel Vallejo	Guillen Meza
Match played	3	3
Tot Set	6	7
Tot Games	50	44
Pts	191-133	155-91
Total Points	324	246
Winners	69	68
%Winners	36%	44%

Both Daniel Vallejo and Guillen Meza played 3 matches. Both players have not conceded a single set in this event so far. Daniel Vallejo has played 1 set(s) less than Guillen Meza (6 vs 7). However, it’s interesting to notice that Daniel Vallejo played 6 games more than Guillen Meza. The Paraguayan scored 69 winners (36% of the total points). On the other side, Alvaro scored 68 winners (44%).

Serve Performance

Serve	Daniel Vallejo	Guillen Meza
Aces	8	4
Avg per match	2.7	1.3
1st in	100/155	84/120
%1st in	65%	70%
1st pts	69/100	68/84
%1st pts	69%	81%
2nd pts	32/55	24/36
%2nd pts	58%	67%

Daniel Vallejo made 8 aces (2.7 per match). Guillen Meza struck 4 aces (1.3 per match). Daniel Vallejo won 69% points on his first serve. He pretty solid on his second serve to win 58% of the points. On the other side, Guillen Meza won 81% of the points on his first serve. He had a solid display on his second serve to win 67% of the points.

How they played the important points

Breaks	Daniel Vallejo	Guillen Meza
Won	15	11
Converted	15/25	11/14
% Converted	60%	79%
Conceded	14	1
Saved	11	1
% Saved	79%	100%
Times Broken	3	0

The Paraguayan broke his opponents 15 times with a 60% conversion rate. Daniel Vallejo conceded his serve 3 times and he saved 79% of the break points that he conceded. Guillen Meza broke his opponents 11 times with a 79% conversion rate. The Ecuadorian was rock solid on his serve as he has never conceded a single service game after saving 1 break points.

Daniel Vallejo
	R1 Ratti	R2 David Martinez	1/4 Emanuel Ambrogi	Total
Score	6-2 6-1	6-2 6-3	6-2 6-4
Tot Set	2	2	2	6
Tot Games	15	17	18	50
pts	65-42	69-48	57-43	191-133
Total points	107	117	100	324
Winners	23	22	24	69
%Winners	35%	32%	42%	36%
SERVE
Aces	3	4	1	8
Double Faults	1	3	1	5
1st in	37/60	26/45	37/50	100/155
% 1st in	62%	58%	74%	65%
1st pts	23/37	22/26	24/37	69/100
% 1st pts	62%	85%	65%	69%
2nd pts	13/23	11/19	8/13	32/55
% 2nd pts	57%	58%	62%	58%
Breaks
Won	6	4	5	15
Converted	6/9	4/9	5/7	15/25
Converted %	67%	44%	71%	60%
Conceded	9	0	5	14
Saved	8/9	0/0	3/5	11
Saved %	89%	–	60%	50%
Times Broken	1	0	2	3

Guillen Meza
	R1 Camacho	R2 Casanova	1/4 Mena	Total
Score	6-2 6-3	6-1 3-0 ret.	6-1 6-4
Tot Set	2	2	2	6
Tot Games	17	10	17	44
pts	58-35	40-19	57-37	155-91
Total points	93	59	94	246
Winners	25	13	30	68
%Winners	43%	33%	53%	44%
SERVE
Aces	3	1	0	4
Double Faults	1	1	3	5
1st in	29/40	18/31	37/49	84/120
% 1st in	73%	58%	76%	70%
1st pts	25/29	13/18	30/37	68/84
% 1st pts	86%	72%	81%	81%
2nd pts	7/11	10/13	7/12	24/36
% 2nd pts	64%	77%	58%	67%
Breaks
Won	4	4	3	11
Converted	4/5	4/5	3/4	11/14
Converted %	80%	80%	75%	79%
Conceded	0	1	0	1
Saved	0/0	1/1	0/0	1
Saved %	–	100%	–	33%
Times Broken	0	0	0	0

Tennis Scores in Guayaquil Challenger

• Juan Pablo VarillasPablo Varillas – Hady HabibHabib (7-5 3-6 6-3) – See score progression
• Federico Agustin GomezAgustin Gomez – Andres AndradeAndrade (6-3 2-6 6-4) – See score progression
• Alvaro Guillen MezaGuillen Meza – Facundo MenaMena (6-1 6-4) – See score progression
• Adolfo Daniel VallejoDaniel Vallejo – Luciano Emanuel AmbrogiEmanuel Ambrogi (6-2 6-4) – See score progression
• Facundo Mena/Franco RoncadelliMena/Franco Roncadelli – Nicolas Barrientos/Diego HidalgoBarrientos/Diego Hidalgo (6-4 7-6²) – See score progression

Upcoming matches in the draw

• Federico Agustin GomezAgustin Gomez – Juan Pablo VarillasPablo Varillas (0-2) – H2H and prediction
• Alvaro Guillen MezaGuillen Meza – (1-3) – H2H and prediction