(Reuters) - Alexander Zverev will take an 11-match winning streak into the U.S. Open after adding the Western & Southern Open title to his Olympic gold medal on Sunday but still rates Novak Djokovic as favourite to take the title at Flushing Meadow.

The German world number four defeated Russian Andrey Rublev 6-2 6-3 in less than an hour in Cincinnati to win his second Masters 1000 tournament of the season and fourth title in all.