NextGenATP Stars Impress At Irving Challenger 2017 Mar 16, 2017 Five NextGenATP stars - Borna Coric, Jared Donaldson, Karen Khachanov, Andrey Rublev and Frances Tiafoe - are making headlines at the Irving Challenger. Tags: 2017 Andrey Rublev Borna Coric Challenger Frances Tiafoe Jared Donaldson Karen Khachanov Share 0 Share on Facebook Tweet Tweet on Twitter +1 +1 on Google Plus