Novak Djokovic has all but secured the year-end world No 1 in the ATP rankings after defeating Borna Coric at the Erste Bank Open in Vienna on Wednesday.
The Serb reached the quarter-finals after coming through against Coric 7-6 (13-11) 6-3. He will end 2020 as world number one as long as Rafael Nadal does not take a wild card as a late entry into the Sofia Open next month.
However, should Djokovic win the title on Sunday, he will take top spot regardless of whether or not Nadal plays Sofia.
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"Borna is a great fighter, a very good friend of mine," said Djokovic. "He has a similar style. He was serving very well specially in the first set, very tough to break him.
"The tie-break again, like yesterday against (Filip) Krajinovic, decided the match, I guess. I am just really glad to stay focused and play my best at the right time."
Third-seeded Stefanos Tsitsipas rallied to defeat Jan-Lennard Struff 6-7 (3-7) 6-3 6-4 and set up a meeting with Grigor Dimitrov, while No 4 Daniil Medvedev advanced with a 6-3 6-1 win over Jason Lung.
Medvedev next plays Vasek Pospisil, who beat Canadian countryman Felix Auger-Aliassime 7-5 7-5.
Also, young Italian star Jannik Sinner defeated Caspar Ruud 7-6 (7-2) 6-3 to set up a clash against Andrey Rublev.
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