The delay was in excess of 15 minutes, so Tsitsipas and Sinner have been given three minutes to warm up ahead of a resumption of play.
Tsitsipas leads 6-3, 2-1.
But the commentators believe the new conditions – under the roof – will favour Sinner.
“We’re not going to go through that awkward part of the day with the shadow moving across the court. We’re now under lights here,†Sam Groth said.
“We saw how well he [Sinner] played against Alex De Minaur once the sun moved away. I thought he was much better in sets 1, 2 and 3 once the sun cleared and he was out of that heat. You spoke about where he’s grown up, what he’s trained in and where he’s lived all his life. The ball is no going to jump around.
“The way Stefanos was bullying Sinner around the court, that’s going to be way more difficult for Tsitsipas to do. The air is going to cool down, the air-conditioning will kick in and the ball won’t fly through the air so much.â€
