Player dossier

Premiership · 2025/2026

Kieran Tierney

Full back

Team: Celtic
Role: Full back
Nationality: Scotland
Date of birth: 05 Jun 1997 (age 29)
Shirt number: 63
Competition: Premiership (Scotland)
Season: 2025/2026

All players

01 / Record

Performance summary

35 appearances · 2,539 minutesEstablished sampleAll figures cover completed fixtures in this season only.

Player recordCompleted fixtures

Appearances: 35
Starts: 29
Minutes: 2,539
Average rating: 7.22
Goals: 6
Assists: 8
Yellow cards: 2
Red cards: Not available

02 / Telemetry

Per-90 statistics

Season totals scaled to 90 minutes played. Metrics the provider did not record are marked as not available rather than zero.

Per-90 data sheetSeason to date

Per-90 statistics
Metric	Per 90
Touches per 90	92.94
Passes per 90	62.56
Accurate passes per 90	51.33
Passes in final third per 90	11.38
Key passes per 90	1.88
Chances created per 90	1.38
Shots per 90	1.03
Shots on target per 90	0.35
Successful dribbles per 90	0.50
Tackles per 90	2.09
Interceptions per 90	0.57
Clearances per 90	4.71
Ball recoveries per 90	3.79
Duels per 90	8.44
Goals per 90	0.21
Assists per 90	0.28
Possession lost per 90	19.64
Saves per 90	Not available
Saves inside box per 90	Not available
Goals conceded per 90	1.17

03 / Telemetry

Efficiency

Success rates computed only where both the numerator and the denominator exist.

Efficiency data sheetSuccess rates

Efficiency rates
Metric	Rate
Pass accuracy	82.0%
Dribble success rate	56.0%
Duel win rate	58.0%
Aerial duel win rate	75.9%
Tackle success rate	62.7%
Shot on target rate	34.5%
Long ball accuracy	37.0%

04 / Role telemetry

Performance profile

Percentiles compare this player with others in the same role and season. Only families relevant to full back are shown.

Role-relative telemetryPercentile 0-100

Compared with Full back players in this season40 in reference group

Passing77.1pctl
Defensive52.4pctl
Ball retention53.8pctl
Duel48.1pctl
Dribbling42.9pctl
Creation90.5pctl
Shooting73.4pctl

05 / Intelligence

Player Intelligence

Experimental in-house signals derived from completed fixtures only. They describe what the data shows — they are not official ratings, and they are not predictions.

Performance telemetryExperimental signals

Efficiency Index

65.6/ 100

Above average

Useful output divided by relevant attempted actions, weighted for the player's role.

Coverage 100%

Opposition Index

47.8/ 100

Balanced schedule

Minutes-weighted strength of the opponents actually faced. Context only — it does not adjust the Impact Score.

35 rated opponents

Momentum Index

0.0/ 100

Falling form

Last 2 scored matches 39.3 vs earlier 64.4 (−25.0).

Breakout Index

17.2/ 100

No upward signal

Signal, not a prediction: recent impact, minutes and starting involvement, read against role-relative standing and opponent strength.

Minutes −1Starts +10pp

Decline Index

82.8/ 100

Sustained negative signal

The same development axis read downwards. A signal of sustained negative movement, not a prediction.

32 scored matches

Final-third profile

Per-90 attacking output from fields the provider actually records. Expected goals, expected assists and spatial metrics are not available in this data and are not estimated.

Final-third profile per 90
Metric	Per 90
Passes in final third per 90	11.38
Key passes per 90	1.88
Chances created per 90	1.38
Big chances created per 90	0.39
Crosses per 90	5.96
Shots per 90	1.03
Successful dribbles per 90	0.50

Team effect

Observational, not causal: team points per completed fixture with and without this player in the starting eleven.

Started29 fixtures1.97pts/match

Did not start9 fixtures2.78pts/match

Difference: −0.81 points per match. This is a description of results only and does not establish that the player caused them.

Efficiency Index components

Pass accuracyweight 30%: 82.0%
Duel win rateweight 25%: 58.0%
Tackle success rateweight 20%: 62.7%
Dribble success rateweight 25%: 56.0%

05.1 / Player telemetry · ProfilePercentile 0-100

Role-relative percentiles from the 2025/2026 season. Only metrics relevant to this player's role are shown.

Role-relative percentile values plotted in the profile chart for 2025/2026
Family	Percentile
Passing	77.1
Defensive	52.4
Ball retention	53.8
Duel	48.1
Dribbling	42.9
Creation	90.5
Shooting	73.4

Dashed ring marks the full back median (50th percentile) across 40 players in the reference group.

06 / Performance index

Football Performance Lab Impact Score

Performance indexExperimental assessment

63.5/ 100

Assessment

Established-sample estimate

35 appearances · 2,539 minutes

Experimental modelCoverage 100%Established sample

Based on available match data — 35 appearances · 2,539 minutes as full back.

Component breakdown

Duelweight 15%: 48.1
Passingweight 20%: 77.1
Creationweight 20%: 90.5
Defensiveweight 25%: 52.4
Dribblingweight 10%: 42.9
Ball retentionweight 10%: 53.8

An experimental in-house model based on available match data. It weights role-relative percentile families and is not an official rating, a definitive measure of player quality, or a prediction.

07 / Match record

Match history

Completed fixtures with recorded minutes, most recent first.

Match recordMost recent first

Recent completed matches with minutes and output
Date	Opponent	Venue	Min	Rating	G	A	YC	Impact
16 May 2026	Hearts3–1	Home	73	6.35	0	0	0	34.4
13 May 2026	Motherwell3–2	Away	78	6.72	0	0	0	—
10 May 2026	Rangers3–1	Home	84	7.58	0	1	1	68.0
03 May 2026	Hibernian2–1	Away	90	7.14	0	0	0	57.0
25 Apr 2026	Falkirk3–1	Home	72	7.36	1	0	0	—
11 Apr 2026	St. Mirren1–0	Home	90	7.21	0	0	0	60.3
05 Apr 2026	Dundee2–1	Away	76	6.71	0	0	0	56.5
22 Mar 2026	Dundee United0–2	Away	90	6.57	0	0	0	—
14 Mar 2026	Motherwell3–1	Home	78	7.64	0	0	0	74.1
04 Mar 2026	Aberdeen2–1	Away	65	7.96	1	0	0	68.1
01 Mar 2026	Rangers2–2	Away	74	6.97	1	0	0	46.1
22 Feb 2026	Hibernian1–2	Home	69	7.48	0	1	0	63.7
15 Feb 2026	Kilmarnock3–2	Away	78	7.68	0	1	0	77.4
11 Feb 2026	Livingston2–1	Home	29sub	6.68	0	0	0	—
01 Feb 2026	Falkirk2–0	Home	83	7.57	0	1	0	61.9
25 Jan 2026	Hearts2–2	Away	73	6.41	0	0	0	43.8
14 Jan 2026	Falkirk1–0	Away	90	7.30	0	0	1	—
10 Jan 2026	Dundee United4–0	Home	90	8.04	0	1	0	70.4
03 Jan 2026	Rangers1–3	Home	88	7.26	0	0	0	67.2
30 Dec 2025	Motherwell0–2	Away	46	6.57	0	0	0	—
27 Dec 2025	Livingston4–2	Away	90	6.94	0	1	0	69.4
21 Dec 2025	Aberdeen3–1	Home	90	8.63	1	0	0	69.4
17 Dec 2025	Dundee United1–2	Away	75	6.84	0	0	0	53.8
07 Dec 2025	Hearts1–2	Home	90	8.38	1	0	0	66.1
03 Dec 2025	Dundee1–0	Home	46sub	6.88	0	0	0	80.2
30 Nov 2025	Hibernian2–1	Away	27sub	6.62	0	0	0	—
22 Nov 2025	St. Mirren1–0	Away	72	7.29	0	0	0	81.1
09 Nov 2025	Kilmarnock4–0	Home	68sub	7.97	1	0	0	73.1
26 Oct 2025	Hearts1–3	Away	90	6.71	0	1	0	68.5
19 Oct 2025	Dundee0–2	Away	90	7.70	0	0	0	85.3
05 Oct 2025	Motherwell3–2	Home	26sub	7.12	0	0	0	—
14 Sept 2025	Kilmarnock2–1	Away	32sub	6.61	0	0	0	76.2
31 Aug 2025	Rangers0–0	Away	72	7.03	0	0	0	—
10 Aug 2025	Aberdeen2–0	Away	90	7.49	0	1	0	56.2
03 Aug 2025	St. Mirren1–0	Home	65	7.40	0	0	0	68.5

Goals, assists and yellow cards are counted from recorded match events, so a 0 means the event did not occur. A dash means the provider sent no value — it never means zero. Match impact is only shown for appearances of at least 30 minutes with sufficient metric coverage.

08 / Season archive

Season context

Competition: Premiership
Season: 2025/2026
Team: Celtic
Appearances: 35
Minutes: 2,539
Average opponent strength: 47.8Minutes-weighted, 0–100 team strength scale. Contextual only — it does not adjust the scores above.

Recent opponents: Hearts, Motherwell, Rangers, Hibernian, Falkirk, St. Mirren.

09 / Season on season

Season on season

Stored season figures for this season next to the previous season of the same competition. Presentation only — no new score is calculated.

No comparable previous season is recorded for this player in this competition.

A comparison is shown only when this player has a published season record in both this season and the previous season of the same competition.

10 / Cross-reference

Compare similar players

Players with a comparable Impact Score profile
Player	Team	Role	Impact	Compare
John Koutroumbis	Motherwell	Full back	61.5	Compare
James Tavernier	Rangers	Full back	61.5	Compare
Anthony Ralston	Celtic	Full back	65.7	Compare
Colby Donovan	Celtic	Full back	66.3	Compare
Jordi Altena	Hearts	Full back	59.6	Compare

Comparable players share the same season and, where possible, the same role, ranked by how close their existing Impact Score is. No new metric is calculated here.

11 / Method

Methodology

Data source

Match, lineup, event and player statistics come from Sportmonks and are stored per fixture. Only completed fixtures with recorded minutes are aggregated — announced lineups and future fixtures are excluded.

Per 90 minutes

A per-90 value scales a season total to a full match: total × 90 ÷ minutes played. It is not calculated when minutes are missing or zero.

Missing data

The provider omits some statistics instead of sending a zero. A missing value is shown as "not available" and never converted to 0, so rates and percentiles are only produced where the underlying fields genuinely exist.

Impact Score

The Football Performance Lab Impact Score is an experimental in-house model that combines role-relative percentile families with explicit weights. It is not an official rating and not a measure of transfer value.

Minimum samples

Values are calculated internally from 180 minutes, but a player is only shown publicly with a ranked Impact Score from 360 minutes and 5 appearances, with at least 90% metric coverage and an established role. A single appearance contributes a match impact observation from 30 minutes.

Full methodology