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The day's best action and reaction from Melbourne Park, where the singles quarter-finals were due to reach their climax. Introduced by Sue Barker.

Men's top seed Rafael Nadal was knocked out by Marin Cilic at this stage last year after being forced to retire injured in the deciding set, while Kyle Edmund of Great Britain and Korean Chung Hyeon both reached a Grand Slam semi-final for the first time. In the women's singles, unseeded Elise Mertens caused an upset against fourth-ranked Elina Svitolina.