She could be giggling at the pain or the ticklishness. Or a mix of both. I've looked a few times and still not decided.
Either way, we're going to be seeing a lot more of this woman on (and off) the tennis court. She's the real deal. Absolutely fantastic. It's like she's been playing at the top level for years, just expecting her to win, and win easily. Likewise Leylah Fernandez (apart from winning easily..!), whom she beat in the final. Both have that exciting, purposeful play, resilient when down, shot variety, matchplay intelligence - you trust them and feel safe watching them, you know that 9/10 they will come through, rather than grabbing that big shock win and then fading back into average result territory, underachieving. Tennis is pretty exciting right now.
Sorry, this is a tennis forum, right?!.... what? Tickling you say?
Well, there's also a couple of insta shots from Iga Swiatek (2020 French Open champion) looking ticklish, one where she's being picked up (underarm poss tickly) and one with one of those massage guns where it looks like it's tickling her. Again, all just potential. No video.
Cheers
TTG