Jannik Sinner has struggled with cramps and extreme heat before securing a 4-6, 6-3, 6-4, 6-4 victory at the Australian Open.

Novak Djokovic has pulled out of the Australian Open tuneup tournament in Adelaide.

Alexander Zverev has saved two match points to overcame Daniil Medvedev 2-6, 6-3, 7-6 and keep alive his Paris Masters title defense.

Valentin Vacherot beat his cousin Arthur Rinderknech 4-6, 6-3, 6-3 to win the Shanghai Masters for the first title of his career after a stunning run from the qualifying rounds.

Two cousins will meet in the final of the Shanghai Open after qualifier Valentin Vacherot stunned a hobbled Novak Djokovic and relative Arthur Rinderknech fought back to beat Daniil Medvedev.

Novak Djokovic had a relatively straightforward victory at the Shanghai Masters for a change as he beat unseeded Zizou Bergs 6-3, 7-5 to reach the semifinals.