Joseph Schooling continued to make waves at the second stop of the Texas Senior Circuit on Friday (yesterday morning, Singapore time), winning the 100m butterfly in 51.82 seconds, the world's seventh-fastest time this season.
The Singaporean's effort just broke fellow University of Texas (Austin) team-mate Jack Conger's meet record of 51.83sec set in 2015.
Schooling's personal best remains the 50.39sec he set in Rio last year on his way to becoming the Olympic champion.
Friday's efforts followed another sterling outing on Thursday, when he won the 50m fly in 23.51sec, the 12th-fastest time in the world this year. The times are regarded as creditable given that he is still loading and unshaven.
"I am definitely happy with my performance in the 100m fly today, 51.82sec is a good time but most importantly, I wanted to make sure that I am getting things right in my preparations for Budapest," he said after beating Bryce Bohman (54.33) and Turker Ayar (54.53) to the gold.
Schooling, who turns 22 next Friday, has qualified for four events at next month's World Championships in Budapest - the 50m, 100m and 200m fly, as well as the 100m freestyle.
He clinched the 100m fly bronze at the last edition in 2015 and told ST last month that he is confident of capturing more than one medal in Hungary this time round.
World championship events Joseph Schooling has qualified for:
• 50m fly
• 100m fly
• 200m fly
• 100m free
The Texas Senior Circuit is organised by professional swim coaches and aims to provide top-quality racing for college swimmers in the United States.
It is held in the long-course metre format (50m pools), a departure from the short-course yards (25-yard lengths) typical of US collegiate racing.