Heat rules come into play at the Australian Open

MELBOURNE, Australia (AP) — Play was suspended on outside courts and briefly halted on undercover arenas in the mid-afternoon Saturday under the extreme heat rules at the Australian Open.

Defending champion Jannik Sinner was down a break in the third set of his third-round match against Eliot Spizzirri and struggling with cramping when play was stopped for several minutes to allow the roof on Rod Laver Arena to be closed.

A match on John Cain Arena was also suspended while the stadium roof was closed.