ZTN Sports Reporter
NOVAK Djokovic and Roger Federer are through to the quarter-finals of the Shanghai Masters tennis tournament.
World number one Djokovic, 32, beat American Kohn Isner 7-5 6-3.
Federer, 38, managed 7-6 (9-7) 6-4 over Belgium’s David Goffin to go through.
He will now face Germany’s Alexander Zverev who is seeded fifth, while Djokovic faces Greece’s sixth seed, Stefanos Tsitsipas.