Estimated market value (beta)
Overview
Weighted average of attribute scores for this role, position-adjusted. Standout attributes count more than weaknesses.
Attributes (grouped)
Mobility
Tall centre-back; no indication of a notable first-step burst. (conf 0.25)
Average straight-line pace assumed for a defender of his size. (conf 0.25)
Likely limited agility for a listed 1.93 m centre-back. (conf 0.25)
Fringe first-team defender; endurance assumed at squad level. (conf 0.25)
Control
Functional control expected of a Primeira Liga squad centre-back. (conf 0.25)
Not a ball-carrying defender; role is mainly to clear and pass. (conf 0.25)
Tall frame helps to protect the ball when he does receive it. (conf 0.25)
No evidence of notable ball-striking quality; kept at a baseline. (conf 0.25)
Distribution
Basic short passing expected for his role; little public evidence. (conf 0.25)
Little documentation of his long passing; kept at a baseline. (conf 0.25)
Crossing is not part of his role as a centre-back; low baseline. (conf 0.25)
Limited public information on his vision; low baseline. (conf 0.25)
Chance threat
Centre-back with no known goal threat; kept at a low baseline. (conf 0.25)
Rarely shoots; baseline value for a defender. (conf 0.25)
Little evidence of attacking runs, apart from set-piece presence. (conf 0.25)
No known dead-ball or long-range shooting threat. (conf 0.25)
Duels
Listed at about 1.93 m, so heading is the likely strength. (conf 0.25)
Physical size helps in duels; little other public evidence. (conf 0.25)
Defense
Average pressing intensity assumed for a centre-back. (conf 0.25)
Defensive output undocumented; baseline for a squad centre-back. (conf 0.25)
Positioning undocumented; baseline for a squad centre-back. (conf 0.25)
Mental
No public evidence of composure either way; kept near average. (conf 0.25)
No public evidence of decision quality; kept near average. (conf 0.25)
Squad-level effort assumed; little public evidence. (conf 0.25)
Resilience
No injury record found; sources give no information either way. (conf 0.2)
Outlook
At 23 he has some room to develop, but little is known about his level. (conf 0.25)
Little-known squad defender at a Primeira Liga club. (conf 0.25)
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Scouting Report & Player Insights
Ismael Sierra, known as Isma Sierra, is a Spanish centre-back who wears number 15 for Estoril Praia. He is a tall defender, listed at about 1.93 m, and has been part of the first-team squad in the 2026-27 season. Little is publicly documented about his earlier career or style of play, so this profile is a cautious baseline built on his size and role. He is 23 years old and still early in his top-flight development.