Qualifier Emil Ruusuvuori made further progress on Tuesday at the new ATP events in Nur-Sultan with a 6-2, 6-0 hammering of Kazakh local Timofey Skatov.
The No 438 went down badly in his career ATP main draw debut, lasting for just 61 minutes against the 98th-ranked Finn.
Ruusuvuori only recently cracked the Top 100 and snapped a five-match losing streak with victory into the second round to next face Australian eighth seed Jordan Thompson.
The Nordic winner broke his teenaged opponent six times as he won nine games in a row in a sprint finish.
US fifth seed Tennys Sandgren lost to Czech Jiri Vesely 6-4, 7-6(7), with the winner oing 5-0 on break point conversions against an opponent who held a set point in the second and fired 13 aces.
“It was a very tough match, Tennys has had very good results on hard courts,” Vesely said.
““He was a tough opponent for the first round, but I’ve been feeling good. I just focused on my serve and waited for my chance.
“The surface is pretty fast, so it’s difficult to return and I waited for one or two chances in the tie-break. I was a little bit lucky at the end.”
The 66th-ranked Czech now takes on Egor Gerasimov after the Belarus player defeated South African Lloyd Harris 6-3, 3-6, 7-6(3).