Vienna: Top seed Novak Djokovic was pushed all the way in the first set of his second-round match in Vienna against Borna Coric.
The young Croatian had four set points but Djokovic fought off all of them before taking it 13-11. He is now 21 and 2 in tie-breaks since last year's Wimbledon.
Coric could only win 3 games in the second set, and Djokovic is now guaranteed to finish as year-end No. 1 for a record-tying sixth time unless Rafa Nadal takes a wild card into Sofia.
Also Read: Vienna Open: Medvedev into round two with easy win over Jung
Stefanos Tsitsipas was last seen pushing Djokovic to five sets in the French Open semi-finals, but here he soon found himself a set down to Germany's Jan Lennard Struff.
But the world number five, and third seed here game back strongly taking the last two sets 6-3, 6-4. Next up for him a real test against the unseeded Grigor Dimitrov.
Daniil Medvedev has not been himself since losing the US Open semi-final to Dominic Thiem. Three defeats in four matches have followed, but this was the world number 6 back to something like his best.
A 6-3, 6-1 demolition of lucky loser Jason Jung.
Next up for the third seed will be qualifier Vasek Pospisil
