Top seed Anett Kontaveit took just 48 minutes to secure her place in the second round of the Prague Open, but Sorana Cirstea suffered a surprise loss.
Defeated in the final of the Hamburg European Open last weekend, Kontaveit got straight back to winning ways in rapid time with a 6-0 6-1 win over Ekaterine Gorgodze.
The world number two got 81.8 per cent of her first serves in, with the overwhelmed Gorgodze only able to win nine returning points across the entire match.
Up next for Kontaveit is Lucie Havlickova after the Czech defeated compatriot Barbora Palicova 6-2 7-6 (7-5).
Fourth seed Cirstea was sent packing from the first round by 19-year-old qualifier Oksana Selekhmeteva, whose 7-5 6-4 success was her first in the main draw of a WTA Tour event.
Dominika Salkova marked her WTA main-draw debut with a 6-1 6-4 win over Ylena In-Albon, while Barbora Krejcikova delighted the home crowd with her 6-3 6-1 triumph against Anna Blinkova.
Due to persistent rain, only three matches were completed at the Warsaw Open on Tuesday.
Clara Burel, Ana Bogdan and Jasmine Paolini all advanced to the second round with wins over Anna-Karolina Schmiedlova, Nuria Parrizas-Diaz and Danka Kovinic respectively.