I don't think so. He just seems to vanish without warning and appear elsewhere. No sound, either. [She's remembering the fight in Seventh Heaven; if Zoro hadn't called out to warn them, neither she nor Sanji would have had any hint that Yuber had teleported behind them.]

...hm.

I can handle lightning. But there's no way at all that Yuber would believe I'd challenge him.

[And she could set herself up as bait, but she has the bad feeling that would attract more than one fish if not handled carefully.]

Luffy can handle lightning, though. And they've already fought. But then ...I don't know if Yuber would fight him again, given that...