Germany's Alexander Zverev stunned four-time champion Novak Djokovic 6-3, 6-4 to win the Rome Masters tennis tournament on Sunday. The 20-year-old Zverev claimed his maiden Masters 1000 title after becoming the youngest player in a decade to reacha final at this level. He will move to top 10 in the world as a result of his impressive victory. Djokovic was the previous youngest Masters finalist, going all the way to the title in Miami as a 19-year-old in 2007.Overall, Djokovic had 27 unforced errors to 14 for Zverev, who also had 16 winners to the Serb's 11.