Following his move to Al Shabab, Sierro's current-season form is down 64% on last season (Season 47→17), while his Rating eased 59→30. His peak season for form remains 2023/24 (Season 53).

Domestic career

Season	Club	Apps	G	A	Match	RTG	Season
2025/26	Al Shabab · 13th	26	0	0	6.89	30	17
2025/26	Toulouse · 10th	3	0	0	7.2	30	2
2024/25	Toulouse · 10th	29	5	1	6.98	59	47
2023/24	Toulouse · 11th	30	6	2	7.03	64	53
2022/23	Toulouse · 13th	16	0	0	6.63	56	6
2022/23	BSC Young Boys	11	0	0	7.09	—	—
2021/22	BSC Young Boys	33	4	0	6.96	—	—

Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year. 7 earlier seasons and 2 youth-team spells in the full career.

Switzerland · international

Side	Apps	G
Switzerland	15	1

Career caps & goals — tournament breakdown in the full career.

Scout report

Project playerDefensive midfielder

V. Sierro is a 30-year-old defensive midfielder at Al Shabab, rated 29.9 overall by Field Insider's model, ranking 208th of 317 on scout potential in the Pro League. An experienced operator, he has been a regular starter this season (65.8% of available minutes). His defensive output reads 3.13 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on Sierro.

Judged on this season alone, Sierro graded 17 — a workmanlike campaign that ranks 20th of 29 of the 29 defensive midfielders in the Pro League, on 0 goals, 0 assists and 3.131 defensive actions per 90.

Year-on-year, that's a drop on last season (Season 47 → 17). Over the 4 seasons on record his form has trended upward, peaking in 2023/24.

On long-term talent our Rating reads 30, 20th of 29 of the 29 defensive midfielders in the Pro League. At 30 Sierro is into the veteran stage, where the age curve weighs on the projection, and a market index of 4.4 reflects that trajectory.

From the career report

Read the full career report →

Past his 2023/24 peak — the recent trend is downward, so buyers are paying for what's left, not what was.

Peak: 2023/24Trending downBreakout: 2023/24Streaky

Current potential20th of 29 defensive midfielders · Pro League Current season20th of 29 defensive midfielders · Pro League20th-best defensive midfielder in the Pro League208th in the Pro League · potential20th-highest potential defensive midfielder in the Pro League

29.9

Ratingi

20th of 29 defensive midfielders

16.5

Seasoni

below regular-starter level

65.8%

Minutes

a regular starter

3.13

Def. actions / 90

moderate defensive volume

Output in context · Al Shabab finished 13th of 18 · a lower-table side

3.13

Def. / 90

Tackles

Interceptions

Clean sheets

3.13 tackles, blocks & interceptions per 90 — moderate defensive volume, with 5 clean sheets across 26 appearances. Doing that for a lower-table side (13th of 18) is harder than the bare numbers suggest: a back line under more pressure has to defend more often and protects fewer leads, so the volume — and any clean sheets — carry real weight.

Strengths

Availability. On the pitch for 65.8% of available minutes — a dependable presence in the XI.

Watch points

Level. Rates below a nailed-on top-tier starter on our model.

Outlook

With a Rating of 29.9, Sierro carries the 20th-highest potential of the defensive midfielders in the Pro League of 29, and he is posting that for a lower-table side (Al Shabab finished 13th of 18) — individual numbers are harder to earn on a struggling team, so his underlying level likely sits a touch above the ranking. Defensively he reads as moderate defensive volume (3.13 tackles, blocks & interceptions per 90). Experienced and reliable, but the value curve is easing (1× now → 0.7× projected in three years).

Generated from Field Insider's rating model · AI-written analysis to follow.

Per 90 & availability

Minutes played %65.8%

Available fixtures34 of 34

Goals / 900

Assists / 900

Goal contribution / 900

Defensive actions / 903.131

Player flow

Goal involvements0

Shot conversion %0

Shot accuracy %37.5

Pass accuracy %86

Dribble success %70.6

Cards / 900.179

Foul involvement / 901.923

Season-by-season progression

Rating (potential)Season (form)

Value & potential by age

Market valueRating

Solid = now · dashed = projected

The gold line is market value — an index (not €) blending rating, age and league. It climbs through the early 20s, peaks around ages 23–27 (~9), then tapers with age. At 30, Sierro sits on 4.4, past its peak and easing. The blue line is Sierro's projected Rating — 29.9 today — recomputed at each age, so it follows the same rise-and-fall as a career matures and declines. Solid = up to today; dashed = projected.