Premier League Tech

Goal-Line Clearance Physics & Millimeter Lab

Hawk-Eye 4K Optical Tracking Active
Presets:
6-Yard Box Trajectory View (Click/Drag to scrub approach)
Time: 0.42s
NO GOAL — BALL CLEARED
11.7 mm remaining on the goal line
0.96 xG Denied
Shot Approach Speed 62 mph (27.7 m/s)
Defender Sprint Recovery Speed 8.4 m/s (30.2 km/h)
Defender Intercept Point (Goal-line Depth offset) 11.7 mm safety margin
Defensive Slide Angle 38°
HAWK-EYE GLT Laser Goal-Line Cross-Section (1:1 Ratio)
Calibrated 12cm line & 22cm ball
Clearance Margin
11.7 mm
Goal Line Overlap
94.7%
Reaction Window
0.24 s
Ball Diameter
220 mm
Line Width
120 mm
xG Prevented
0.96
// Live Hawk-Eye Telemetry Feed...
The Whole of the Ball Rule (Law 10)
Under IFAB Law 10, a goal is scored only when the entire circumference of the ball has completely passed over the goal line between the posts. Even if 99% of the ball has crossed, a 1mm spherical curvature tangency on the outer edge is officially NO GOAL.
The 11.7mm Benchmark (John Stones 2019)
On January 3, 2019, Man City defender John Stones sprinted at 8.4 m/s and hooked Mohamed Salah's deflection clear with exactly 11.7 millimeters remaining. City went on to win the match 2-1 and claimed the title by 1 single point over Liverpool.
Hawk-Eye 7-Camera Triangulation
Premier League stadiums employ seven synchronized high-speed cameras per goal mouth recording at 500 FPS. Hawk-Eye reconstructs the 3D spherical envelope in real-time with sub-millimeter precision and vibrates the referee's watch within 1 second.