Fraction of sources within a given radius from the Spiderweb Galaxy. X-ray cluster members (shown in blue) have the same distribution as all the spectroscopically confirmed protocluster members in the 2.11 < z < 2.20 range (shown in red). On the other hand, the distribution of all the X-ray sources (dominated by the field) is clearly less clustered. The thin black line shows a perfectly uniform source distribution. The shaded area corresponds to an uncertainty of 1σ.