Despite her lack of wins of late, Barthel looked in fine form from the off, racing through the first four games and wrapping up the opening set shortly after. Even a lengthy rain delay midway through the second failed to derail the No.7 seed, who closed out a 63 62 win shortly after the resumption.
"It was a little bit difficult because of the conditions in the beginning; it was really windy and then we had a long break because of the rain," Barthel said.
"I think I played a solid match and played well on the big points, and I'm really happy that I won today because I have lost a lot over the past couple of months! For the rest of the tournament, I just want to go out there and have fun and hopefully the results will follow," she added.
After a stuttering start, Tsurenko settled herself with a service break in the fourth game before breaking again in the final game to clinch the set. This setback seemed to break the Spaniard's resolve and Tsurenko steamrollered through the second in just 16 minutes and into the second round, 75 60.
"I wasn't so confident at the beginning of the match, but as the match went on I started playing better and better," Tsurenko said. "Even though I won the first set, I needed that break at the start of the second and this calmed me down.
"The second set was perfect. In fact it was better than perfect! I'm really enjoying playing here and I hope I can continue to play this way for the rest of the tournament."
In the doubles competition, No.2 seeds Olga Govortsova and Klaudia Jans-Ignacik got their challenge underway with a routine 64 62 win over Swedish wildcard pairing Beatrice Cedermark and Rebecca Peterson.
Meanwhile, there was better news for their compatriots Sofia Arvidsson and Johanna Larsson, who came from a set down to advance. Other teams booking a quarterfinal spot were Eva Hrdinova and Mervana Jugic-Salkic and Sandra Klemenschits and Tatjana Malek.