Iga Swiatek shrugged off lingering weariness to partner Casper Ruud to back-to-back victories in the revamped mixed doubles competition at the US Open on Tuesday.

Swiatek — who on Monday had battled through a two-hour tussle with Jasmine Paolini to win the Cincinnati Open — looked full of energy as she and Ruud powered into Wednesday’s semi-finals.

Swiatek and Ruud needed just 39 minutes to dispatch the US pairing of Madison Keys and Frances Tiafoe 4-1, 4-2 in their opening game at Arthur Ashe Stadium, and then reappeared roughly 20 minutes later to defeat Caty McNally and Lorenzo Musetti 5-3, 4-2 in their quarter-final clash.

The victories capped a gruelling 24 hours for Polish star Swiatek, who hot-footed it to the airport after Monday’s win in Cincinnati and only arrived at her hotel

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