We describe the fits of the top-quark mass value at NNLO using as input the double-differential distributions in rapidity and invariant mass of 𝑡 ¯𝑡 pairs obtained by the ATLAS and CMS collaborations from unfolding of their experimental data to the parton level, compared to NNLO theory
predictions. We consider different state-of-the-art PDF sets, finding results of the fits compatible among each other within uncertainties. On the other hand, we observe some tension among the fits to different datasets.