TESS target pixel file of Sector 20 of TOI-5734, which is marked with ‘1’. The other sources, extracted from the Gaia DR3 catalogue, have numbered circles of sizes proportional to the G-mag difference with our target. The colour bar shows the electron counts for each pixel. The orange squares represent the pixels used to construct the aperture photometry by the TESS pipeline. Grey arrows indicate the direction of the proper motions for all the plotted sources. The dashed green circle represents the reference three-pixel aperture to select the targets relevant for the dilution factor estimate.