British number one Cameron Norrie says he has no explanation for his poor performance after he crashed out of the Australian Open in the first round.

The 12th seed was expected to beat American youngster Sebastian Korda, but he looked off the pace from the outset and lost 6-3 6-0 6-4 on Monday.

Norrie was Great Britain’s leading hope to win the title Down Under, but six more Britons, including Emma Raducanu and Andy Murray, are in action on Tuesday.

Norrie will now head home after his lacklustre display, and he says he is confused by the performance.

“It is so disappointing to start the year like this,” he said. “I was never really in the match at all. I played a loose game at the start of every set, and he took care of his serve very well.

“I am disappointed with my level throughout.”

Elsewhere in the men’s draw, Rafael Nadal started with a routine win as he bids for a record 21st Grand Slam title (Nadal 11/2 to win the tournament – outright).

Nadal, who is the only former Melbourne champion still in the draw, beat Marcos Giron 6-1 6-4 6-2.

The Spaniard will now face German qualifier Yannick Hanfmann in the second round, after he beat home favourite Thanasi Kokkinakis 6-2 6-3 6-2.

Matteo Berrettini, Gael Monfils, Carlos Alcaraz, Denis Shapovalov and Hubert Hurkacz also won on Monday to book their spot in the second round.

In the women’s draw, antepost favourite Ashleigh Barty (11/4) cruised into the second round in just 54 minutes.

The world number one thrashed Lesia Tsurenko 6-0 6-1, winning 11 games in a row during a routine day at the office.

Rival Naomi Osaka (6/1 to win the tournament – outright) opened her defence with a dominant win of her own, beating Colombia’s Camila Osorio 6-3 6-3.

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