Well,Ex,I respectfully say that my knowledge in this specific area is superior to yours because I actually teach English for a living.While it's true that Petra is charming and likable,that's b/c she's very sincere,candid and down-to-earth,personality-wise.
If you evaluate the technical quality of Petra's English,it's mediocre at best.She's not annoying,per se,but it would be quite tedious if you had to listen to her speak English for 20 minutes.If you take slutty Ana,by comparison,she's almost 100% fluent so that makes her easier to market,even when you don't count the cheesy,low-class,eye-candy appeal to casual male tennis fans.However,Petra is FAR more charming than the Serb cuz Petra isn't some fake who's pre-fabricated by a well-designed media hype machine.Even if she NEVER improves her English(and I suspect that she WILL,even if slowly and gradually),she'll still be a very easy player to like on a personal level
1) What does this have to do with Petra winning, and her game? That's our biggest concerns.
2) What does this have to do with the fact that media loves to talk to Petra, and the fact that they had already geared her up to the "Next Coming" or "great one" in tennis? Petra was all the talk during the 2012 Australian Open.
3) What does this have to do with the success or marketing or a Bjorn Borg, Martina Navratilova, Rafael Nadal, Boris Becker, Steffi Graf, (not now), etc, who barely spoke decent English, but were successful, well regarded, well liked and marketed? You gotta produce, give reason. And a explosive, fun to watch, winning tennis game does tbe best talking.
I respect your English teaching skills. However, I think because of that, you're viewing this from too technical a standpoint. If that's the case; Zsa Zsa Gabor (a notoriously poor, but sometimes entertaining English speaker) and others like her, would never had been a talk show Queen/favorite in America; which she was. The media roots for Petra, and wants to market her. We know, because We've heard many of them say this. However, how can they, if/when she's not winning or living up to expectations? If that was the case, people would dislike Rafael Nadal, cause even now, his English is horrible. But no one cares. We all think it's cute or charming. Come on now Bruce.
And like I said earlier: I couldn't really care less about the marketing and interviews (unless Petra says something dumb or failingly revealing about her game and preparation). I'm more interested in her tennis game (which sucks) at the moment.
We can just leave it at that. I'll let others argue this, if they like.