Muon reconstruction performance of the ATLAS detector in Run 2

We will discuss the performance of the improved ATLAS muon reconstruction as measured during the 2015 run of the LHC at $\sqrt{s}=13$ TeV. Dimuon resonances ($J/\psi \rightarrow \mu \mu$ and $Z \rightarrow \mu\mu$) are used to measure reconstruction and isolation efficiencies as well as transverse momentum resolution and momentum scales. Measurements are made in the various detector regions and for muon momenta between 5 and hundreds of GeV. They are all found to be in good agreement with tuned Monte Carlo simulation.