Donald Young’s love affair with the US Open took a beating on Thursday as he stumbled to a straight-set defeat to Ivo Karlovic in the second-round battle.

Young, who has made the fourth round on two occasions in 2011 and 2015, failed to hold his nerves at crucial junctures en route a 6-4 7-6 6-4 loss. He served zero aces against his big-serving opponent’s 24, and failed to convert any of the six break-points opportunities.

Young’s struggle became more evident when he vent his frustration on his racquet, banging it time and again.

#Young
For @stewieALQ pic.twitter.com/FZQ0OtdH5G

— doublefault28 (@doublefault28) September 2, 2016

As for Karlovic, the No. 21 seed, he moves on to the third round to face another American in Jared Donaldson.