Re: "WTA players are more unstable emotionally" - Tsonga
Are you even sure Jo meant periods with "all these bad things"? First of all, on average, women are mentally more sensitive than men, I'm sure everybody has empirical evidence on that. And I first interpreted that he meant female hormones are the reason to that. And just being unstable emotionally causes you aren't ohysically in your best shape. On the other hand, men don't have those hormones, those bad things.
At least I first interpreted that this way.