The 22-year-old Draper had struggled physically in his opening match against Marcos Giron, escaping in five sets and then rushing to a courtside bin to vomit.

He looked to have recovered reasonably well going into the clash against American 14th seed Tommy Paul, but fell to a 6-2 3-6 6-3 7-5 defeat.

Draper took confidence from having beaten Paul in both of their previous meetings, including comfortably last week in Adelaide, but the 26-year-old – a semi-finalist here last year – was sharp from the start.

The match was delayed by blustery showers in Melbourne and, when it did get under way, Draper came out of the blocks slowly, dropping serve three times in the opening set.

He hit back well in the second, beginning to trouble Paul with his power game, but it was the American on top again in the third set.

The conditions certainly did not make things easy and Draper looked hugely frustrated by his inability to time the ball as consistently as he would have liked.

Paul looked on his way to victory when he broke serve again to start the fourth set, but Draper fought back well to force two set points with a nervous Paul serving at 4-5.

He could not take either, though, and a missed forehand in the next game gave Paul the chance to serve for the match, which he took.

Meanwhile, Katie Boulter came out second best in a power battle with 12th seed Zheng Qinwen.

British number one Boulter has had a great start to the season and she certainly played her part in an entertaining clash against Zheng, who is one of the rising stars of the game.

Ultimately she could not secure a spot in the third round, though, losing out 6-3 6-3 to the 21-year-old Chinese star in windy conditions at Melbourne Park.

Given the weather, this was a quality encounter between two of the cleanest ball strikers in the game.

It was a nip-and-tuck contest, with little to choose between them throughout, but ultimately it was Zheng who managed to come out on top in the crucial moments.

Boulter led by a break at 3-2 in the second set but Zheng responded with a run of four games in a row.

The last game was the longest of the match, with Boulter saving five match points but unable to take any of six break points before Zheng finally clinched it with an ace.