ATP Finals: Tsitsipas stuns Federer to reach final against Thiem

London( CNN) For the second straight year, Roger Federer was undone by a 21 -year-old in the semifinals at the ATP Finals, much to the disappointment of the overwhelming majority of the 18,000 devotees inside London’s O2 Arena.

Alexander Zverev knocked out the famed Swiss 12 months ago en route to the crown, and on Saturday it was the turn of Stefanos Tsitsipas. He became the youngest finalist on his ATP Finals debut since Hall of Famer Jim Courier in 1991.
The Greek talent prevailed a gargantuan one-ninth activity of the opening set as part of a 6-3 6-4 win over tennis’ best subsidized actor, a period after Tsitsipas fell in an extended thriller against another of the game’s behemoths, Rafael Nadal.