Danish qualifier Clara Tauson fell to a 6-4, 7-6(0) defeat on Tuesday at the St Petersburg Ladies Trophy barely a week after winning the first WTA title of her career in Lyon.
The No. 91 who is tipped for a fast rise, lost to Russian eighth seed Daria Kasatkina in the first round.
Service breaks were the order of the day, with 11 in a contest lasting for just under two hours.
“It means a lot, every match you win at home, it counts twice,” Kasatkina said. “I wasn’t happy about my draw, when I found out the qualifier I’m going to play!
“But it was a very good match and I was happy that I was able to get it.
“The first match is always tricky, but I’m happy with the level of the game and how the match went; I’m happy to play another match with a crowd.”
Tauson, aged 18, had won her last nine matches from Lyon and her weekend qualifying rounds.