Russia's Daniil Medvedev will become the world number one men's tennis player after rankings will get updated on Monday. He'll overtake 34-year-old Novak Djokovic, who has been the world number one for past 132 weeks. The 26-year-old Russian will be the first player other than Roger Federer, Djokovic, Rafael Nadal and Andy Murray to claim the top spot since 2004.