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When I was a kid, I used to play tennis on the rusty concrete court around the corner from our place. My friends and I spent countless hours there, which is why the sport has always stayed close to my heart—and remains the only one I truly enjoy watching.

This week, I’ve been following the Australian Open, which is still ongoing, and there have already been some great matches. That got me thinking about how dominance in tennis is measured over time. Many people agree that Djokovic sits at the top when it comes to total Grand Slam titles, but it made me curious about how those wins are distributed across each major. The table below summarizes that breakdown.

What stands out from the table is the contrast in geographic dominance between the two ATP and WTA tours. The women’s records are overwhelmingly held by American players across all four Grand Slams, while the men’s side is largely defined by European dominance.

The US has more than 3.7 Million confirmed cases of Covid-19 cases and it's therefore the country with the highest number of those in the world. What it has been in the news lately is how states that rushed up to reopen as quickly as possible such as Texas and Florida, have an steady and exponencial increase on the total number of cases.

Next to California, who has seen also a sharp increase in the number cases, mainly in Los Angeles county, those states are getting closer to match the numbers of New York. It feels like a cautionary tale, that "going back to normal", won't as the precovid-19 normal until there is an effective vaccine or treatment in place.

Fortunately the an mRNA vaccine trial preliminary report in the NEJM stated the vaccine induced anti–SARS-CoV-2 immune responses in all participants, and no trial-limiting safety concerns were identified. Crossing the fingers for the next phases of those promising results.

After a couple of days of competition in the 2016 Rio Summer Olympics, the medals table starts to look similar to London 2012. This is the current table

And this is how the table looked at the end of the London competition.

Clearly the US and China are dominating on this sport event.