In her tournament debut and playing Cadantu for the first time, Radwanska needed some time to adapt - she lost the first two games of the match, won four in a row, then saw that 4-2 lead become 4-all - but from there she dominated, reeling off eight games in a row to put the crafty Romanian away, 64 60.
"I've never played here and every hardcourt is different," Radwanska said. "Here the center court is really slow, so in the beginning I couldn't really feel my rhythm, and in the first couple of games I was struggling a little bit. But I got used to it and it was much, much better. I had to be very patient today, because you can't finish the point in one ball here, you really have to make a couple of shots first.
"In the second set I was really playing my best tennis."
And what about playing Cadantu for the first time? "If I play someone I've played 10 times before, I know pretty much what I have to do to. It's tricky when you play someone for the first time, but after a few games on the court with them I already have an idea what I have to do to win the match."
Radwanska has had a lot of success at International-level tournaments. After going 7-6 in the first six of her career, with her best results being two quarterfinals, she has gone 27-4 in her last nine, winning four titles (Stockholm in 2007, Pattaya City and Istanbul in 2008 and Auckland earlier this year).
So how does the World No.4 feel about Seoul? "It's always very exciting to play a tournament for the first time, especially after playing the same tournaments so many years," she said. "My friend Maria Kirilenko played here a few times before and told me how great it is, so it's very exciting to be here.
"But I always go to tournaments to win, so I will do everything I can to win this tournament."
There's one last new thing for Radwanska this week. Well, half new - having been a brunette for all of her career, she changed her hair color to blonde at Madrid earlier this year, and now, with her fall campaign kicking off this week, the Pole is now sporting a mix of brunette and blonde locks up top.
"It's not really new actually - before I was either blonde or brunette, and now it's half and half, so nothing really new!" Radwanska commented. "It's just a compromise between these two colors!"
Radwanska and Cabeza Candela will be playing against each other for the first time.