Scheduled after Djokovic on Rod Laver Arena is Naomi Osaka (16) v Maddison Inglis. Osaka has been in the news.

The Australian Open issued a statement on social media at 2.36pm local time.

“The AO Heat Stress Scale is above 5.0,” it said. “Play is suspended for all matches and practice on outside courts. The roofs on RLA [Rod Laver Arena], MCA [Margaret Court Arena] and JCA [John Cain Arena] will close and remain closed for the remainder of the match.

“If onsite, please seek shade and apply cooling strategies.”

Novak Djokovic made short work of his opponents in rounds one and two: Pedro Martínez and then Francesco Maestrelli were dismissed in straight sets, with identical scorelines: 6-3, 6-2, 6-2. The Serbian would certainly take the same today against the dangerous world No 75 Botic van de Zandschulp, who beat him at Indian Wells last year, and has taken out Carlos Alcaraz and Rafael Nadal in the past couple of seasons.