Novak Djokovic has reiterated his credentials as a key contender for the ATP Finals title with the help of another clinical performance. The world No.1 dropped only five points behind his serve during his straight sets triumph over Marin Cilic. Meanwhile, rising star Alexander Zverev was another player to produce a powerful service display as he brushed aside John Isner. Zverev will take on Roger Federer on Saturday afternoon, followed by Djokovic against Kevin Anderson in the evening.
