Dmitry Popko (L) with Marin Cilic at World Group quarterfinal

VARAZDIN, April 7, 2018 (Xinhua) — Dmitry Popko (L) of Kazakhstan shakes hands with Marin Cilic of Croatia after the Davis Cup singles at World Group quarterfinal between Croatia and Kazakhstan in Varazdin, Croatia, on April 6, 2018. Marin Cilic won 3-0. (Xinhua/Sanjin Strukic)