Adolfo Daniel Vallejo and Alvaro Guillen Meza will fight against each other in the semifinal of the Buenos Aires Challenger for the 3^rd time in their career. They are scheduled to play on Saturday at 10:00 am on CANCHA CENTRAL. In the following paragraphs, you can find the head to head analysis and prediction.

Prediction, odds and live streaming

The pick for Tennis Tonic is Alvaro Guillen Meza who should win in 3 sets.

As per the initial odds, Alvaro Guillen Meza is the pick to win this match.
Alvaro Guillen Meza -> 1.57
Adolfo Daniel Vallejo -> 2.28

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

This will be the 3^rd time that Adolfo Daniel Vallejo and Alvaro Guillen Meza clash against each other. The head to head is 1-1 for Daniel Vallejo and Guillen Meza (see full H2H stats),but they are 1-1 on clay.

The last time that they fought against each other, Daniel Vallejo won 1-6 6-2 6-1 in the quarter in M25 Punta del Este back in 2024.

Adolfo Daniel Vallejo

Ranked no. 234, Adolfo reached the semifinal after beating Renzo Olivo 6-4 6-2, Genaro Alberto Olivieri 6-3 6-4 and Gonzalo Villanueva 3-6 6-3 6-4.

In the quarter against Villanueva, Adolfo recovered from a 1-set down deficit before winning (3-6 6-3 6-4). During the match, Daniel Vallejo scored 92 points vs Villanueva’s 84. The Paraguayan was pretty aggressive to blast 41 winners.

Talking about the service games, Daniel Vallejo managed to score 2 aces and he committed only 6 double faults. Adolfo Daniel Vallejo lost the serve 3 times and he saved 7 break points. Furthermore, Daniel Vallejo put 60% of his first serves in, winning 80% (41/51) of the points behind his 1st serve and 41% (14/34) on the 2nd serve. Adolfo broke Villanueva 4 times after converting 57% of his break points (4/7).

Overall Performance in this tournament

Adolfo has conceded 1 set in this tournament to conquer 55% of the points he played.

Daniel Vallejo has a winning record in the last 6 years having won 56% of his matches (93-73). 3-0 on clay in 2025. Regarding his performance on the same surface of this tournament, Daniel Vallejo has a compiled60-48 record in the last 6 years on clay.

Daniel Vallejo has a composed 4-2 win-loss record in 2025, 3-0 on clay (See FULL STATS).

Previously in the Buenos Aires Challenger

Alvaro Guillen Meza

Ranked no. 270, Guillen Meza got to the semifinal after beating Andrea Collarini 6-4 4-2 ret., Joel Schwaerzler 6-3 6-2 and Santiago Rodriguez Taverna 6-1 6-4.

In the quarter, Alvaro had a good straight sets win against Rodriguez Taverna (6-1 6-4). During the match Guillen Meza scored 77 points vs Rodriguez Taverna’s 55. Guillen Meza was quite aggressive to blast 24 winners.

Talking about serving, Guillen Meza was unable to score even 1 ace for the entire match and he committed only 5 double faults. Alvaro Guillen Meza lost the serve once and he saved 5 break points. Furthermore, Guillen Meza put 56% of his first serves in, winning 67% (24/36) of the points behind his 1st serve and 68% (19/28) on the 2nd serve. The Ecuadorian broke Rodriguez Taverna 4 times after converting 44% of his break points (4/9).

Overall Performance in this tournament

Guillen Meza hasn’t dropped yet a set in the tournament to win 59% of the points he played.

Alvaro has a composed 3-0 win-loss record in 2025, 3-0 on clay (See FULL STATS).

Previously in the Buenos Aires Challenger

Previously, his best result was reaching the 1^st round in 2024. See his history.

H2H Performance in the tournament (main draw)

Matches, sets, games and points

Points	Daniel Vallejo	Guillen Meza
Match played	3	3
Tot Set	7	7
Tot Games	65	50
Pts	244-197	197-140
Total Points	441	337
Winners	97	64
%Winners	40%	32%

Both Daniel Vallejo and Guillen Meza played 3 matches. At the moment, Adolfo Daniel Vallejo lost 1 set while Alvaro Guillen Meza hasn’t lost a set so far. Talking about their workload, Daniel Vallejo and Guillen Meza have played the same amount of sets 7. However, Daniel Vallejo played 15 games more than Guillen Meza. Adolfo scored 97 winners (40% of the total points). On the other side, Alvaro made 64 winners (32%).

Serve Performance

Serve	Daniel Vallejo	Guillen Meza
Aces	4	6
Avg per match	1.3	2
1st in	142/241	82/153
%1st in	59%	54%
1st pts	97/142	64/82
%1st pts	68%	78%
2nd pts	47/99	40/71
%2nd pts	47%	56%

Daniel Vallejo blasted 4 aces (1.3 per match). Guillen Meza made 6 aces (2 per match). Daniel Vallejo won 68% points behind his first serve. He was rock solid on his second serve to win 47% of the points. On the other side, Guillen Meza won 78% of the points behind his first serve. He had a solid display on his second serve to win 56% of the points.

How they played the important points

Breaks	Daniel Vallejo	Guillen Meza
Won	15	13
Converted	15/21	13/33
% Converted	71%	39%
Conceded	35	9
Saved	26	5
% Saved	74%	56%
Times Broken	9	4

Daniel Vallejo broke his opponents 15 times with a 71% conversion rate. Adolfo conceded his serve 9 times and he saved 74% of the break points that he conceded. Alvaro broke his opponents 13 times with a 39% conversion rate. Alvaro conceded his serve 4 times and he saved 56% of the break points that he conceded.

Daniel Vallejo
	R1 Olivo	R2 Alberto Olivieri	1/4 Villanueva	Total
Score	6-4 6-2	6-3 6-4	3-6 6-3 6-4
Tot Set	2	2	3	7
Tot Games	18	19	28	65
pts	81-64	71-49	92-84	244-197
Total points	145	120	176	441
Winners	32	24	41	97
%Winners	40%	34%	45%	40%
SERVE
Aces	0	2	2	4
Double Faults	7	6	6	19
1st in	52/87	39/69	51/85	142/241
% 1st in	60%	57%	60%	59%
1st pts	32/52	24/39	41/51	97/142
% 1st pts	62%	62%	80%	68%
2nd pts	18/35	15/30	14/34	47/99
% 2nd pts	51%	50%	41%	47%
Breaks
Won	5	6	4	15
Converted	5/7	6/7	4/7	15/21
Converted %	71%	86%	57%	71%
Conceded	15	10	10	35
Saved	13/15	6/10	7/10	26
Saved %	87%	60%	70%	72%
Times Broken	2	4	3	9

Guillen Meza
	R1 Collarini	R2 Schwaerzler	1/4 Rodriguez Taverna	Total
Score	6-4 4-2 ret.	6-3 6-2	6-1 6-4
Tot Set	2	2	2	6
Tot Games	16	17	17	50
pts	54-42	66-43	77-55	197-140
Total points	96	109	132	337
Winners	23	17	24	64
%Winners	43%	26%	31%	32%
SERVE
Aces	2	4	0	6
Double Faults	2	3	5	10
1st in	26/45	20/44	36/64	82/153
% 1st in	58%	45%	56%	54%
1st pts	23/26	17/20	24/36	64/82
% 1st pts	88%	85%	67%	78%
2nd pts	7/19	14/24	19/28	40/71
% 2nd pts	37%	58%	68%	56%
Breaks
Won	4	5	4	13
Converted	4/8	5/16	4/9	13/33
Converted %	50%	31%	44%	39%
Conceded	2	1	6	9
Saved	0/2	0/1	5/6	5
Saved %	0%	0%	83%	28%
Times Broken	2	1	1	4

Tennis Scores in Buenos Aires Challenger

• Juan Pablo VarillasPablo Varillas – Emilio NavaNava (6-4 7-5) – See score progression
• Adolfo Daniel VallejoDaniel Vallejo – Gonzalo VillanuevaVillanueva (3-6 6-3 6-4) – See score progression
• Alvaro Guillen MezaGuillen Meza – Santiago Rodriguez TavernaRodriguez Taverna (6-1 6-4) – See score progression
• Boris Arias/Federico ZeballosArias/Federico Zeballos – Murkel Dellien/Juan Carlos Prado AngeloDellien/Juan Carlos Prado Angelo (6-2 7-5) – See score progression
• Adolfo Daniel VallejoDaniel Vallejo – Gonzalo VillanuevaVillanueva (3-6 6-3 6-4) – See score progression
• Alvaro Guillen MezaGuillen Meza – Santiago Rodriguez TavernaRodriguez Taverna (6-1 6-4) – See score progression
• Juan Pablo VarillasPablo Varillas – Emilio NavaNava (6-4 7-5) – See score progression
• Gonzalo BuenoBueno – Murkel DellienDellien (6-4 6-1) – See score progression

Upcoming matches in the draw

• Juan Pablo VarillasPablo Varillas – (1-0) – H2H and prediction