Novak Djokovic is in the semifinals of the Australian Open tennis.
The Serbian champion, number 1 in the world, beat the young German Alexander Zverev, number 6 in the ranking, by a comeback in four sets, with a score of 6-7, 6-2, 6-4, 7-6, at the end of a three and a half hour match in Melbourne's Rod Laver Arena.
Djokovic, who has already won eight times here, will face the surprise of the tournament in the semifinals, the Russian Arslan Karatsev who, starting even from qualifying and his first participation in Melbourne, last night eliminated the Bulgarian Dimitrov.