He will now play Daniil Medvedev at the semi finals

Novak Djokovic beat top seed Alexander Zverev 4-6, 6-4, 6-4 in the quarter-finals of the China Open on Sunday, keeping alive an extraordinary unbeaten streak in Beijing.
The veteran Serbian electrified a packed crowd in the Chinese capital to earn a semi-final match with Daniil Medvedev.