Russia`s Karen Khachanov demolished fourth seed Alexander Zverev of Germany 6-1, 6-2 on Friday to power into the last four of the Paris Masters. Khachanov, the winner at last month`s Kremlin Cup in Moscow, will meet either defending champion Jack Sock or Austrian sixth seed Dominic Thiem for a place in the final. World number 18 Khachanov saved two match points against John Isner in the last 16 but needed just over an hour to dispatch an out-of-sorts Zverev, who dropped his serve six times in eight games. Four-time Paris champion Novak Djokovic takes on Marin Cilic in the quarter-finals later on Friday, while Roger Federer will meet Japan`s Kei Nishikori. Djokovic will replace Rafael Nadal as the world`s top player on Monday after a two-year absence. Meanwhile, Federer, 37, is three wins away from his 100th career title after triumphing on home ground in Basel last week.