Heart of a champion! At 2:22 am, @marincilic prevails in Louis Armstrong Stadium 4-6, 3-6, 6-3, 6-4, 7-5 over De Minaur in a match made for NYC. What an effort! 👏👏👏 #USOpen #atp #tennis #sports #marincilic #louisarmstrongstadium #grandslam #usopen50