ATP Finals : Tsitsipas Beats Zverev To Book Semi-Finals Spot
Debutant Stefanos Tsitsipas crushed defending Champion Alexander Zverev 6-3 and 6-2 to book his place in the last four of the ATP Finals with a match to spare.
The 21-year-old backed up his opening win over Daniil Medvedev with a virtuoso performance.
His straight-sets victory secured a top-two place in the Group and left Zverev, World Number One Rafael Nadal and Medvedev scrapping to join him in Saturday's Semi-Finals.
After losing the first set, Zverev's level tailed off alarmingly in the second set and Tsitsipas wrapped things up with an ace.