  The large top-quark samples collected with the ATLAS experiment at the LHC
have yielded measurements of the inclusive \ttbar production cross section of
unprecedented precision and differential measurements in new kinematic
regimes.They have also enabled new measurements of top-quark properties that
were previously inaccessible, enabled the observation of many rare top-quark
production processes predicted by the Standard Model and boosted searches for
flavour-changing-neutral-current interactions of the top-quark, that are
heavily suppressed in the SM. In this contribution the highlights of the ATLAS
top-quark physics program are presented, as well as projections of the expected
sensitivity after the High Luminosity phase of the LHC. Talk presented at the
International Workshop on Future Linear Colliders (LCWS 2023), 15-19 May 2023.
C23-05-15.3.
