MESS2 detection probabilities of HD 113337. The four plots correspond to our four (age; i) cases (~20 Myr or ~1 Gyr, and i within 10–30° or uniform i distribution, respectively). On each plot, the contour colours (from white to black) correspond to a higher or lower (respectively) detection probability of additional companions, as indicated by the numbers: 1 indicates a detection probability over 99%, 0.9 over 90%, etc. We show the assumed true masses of HD 113337 b and c (full and empty red dots, respectively) on the top plots (inclination assumed to be 25°), and their minimal masses on the bottom plots. On the top of each plot, we indicate the outer debris disc extension resolved in this study with a red band. We also indicate the disc position previously assumed from SED fits from the literature: from Moór et al. (2011; purple triangle), Rhee et al. (2007; yellow triangle), and the inner disc component from Chen et al. (2014; green triangle), respectively.