Thanks to his 10th Australian Open title, Novak Djkovic has returned to the top spot in the ATP rankings updated on Monday, replacing former number one Carlos Alcaraz of Spain. Alcaraz missed the tournament in Melbourne due to injury. His countryman Rafael Nadal, who was defeated in the second round of the Australian Open and struggled with a hip injury, dropped four places to sixth. Olympic champion Alexander Zverev, who also exited the first Grand Slam of the year in the second round, dropped from 13th to 14th. In the women’s WTA rankings, Belarusian Aryna Sabalenka moved up three places to …