Such is the German's intensity and focus, she might not even notice any celebrity faces gathered around this rectangle of grass.
Moore added of Meghan's disposition, "She seemed very relaxed and was joking and laughing".
There will be a couple of duchesses in attendance on Saturday.
Kate, who is patron of the All England Lawn Tennis and Croquet Club and is a longstanding fan of Wimbledon, will also pay a visit to SW19 on Sunday when she will watch the Gentlemen's Singles Final along with the Duke of Cambridge.
Meghan Markle to watch Serena Williams play Wimbledon
This is not inevitable for me, I had a really tough delivery and multiple surgeries and nearly didn't make it to be honest. Williams is headed to her 10th Wimbledon final after defeating Germany's Julia Goerges 6-2, 6-4 on Thursday.
Meghan will be accompanied by the Duchess of Cambridge, and the pair will meet some of the Championships' ball boys and ball girls, and junior players.
The Wimbledon Ladies' Single Final is at 2pm on Saturday.
Meghan is no stranger to SW19 either, having attended twice during the summer of 2016 while she was secretly dating Prince Harry.
An avid tennis fan, Kate has attended nearly every year since becoming a royal, is patron of The All England Lawn Tennis and Croquet Club, and famously had a tennis court built at her Amner Hall home. "I didn't but she's so good herself, right?!" exclaimed Martin. "Every year for a couple years she comes out to Wimbledon, has supported me".
Then on Thursday, she was told the official announcement from the palace had arrived. Williams has been playing coy about the possible appearance all week.
Thomas was asked to walk Meghan down the aisle when she tied the knot with Harry, 33, but, just days before their nuptials were due to take place, he was forced to pull out because he had to undergo emergency surgery on his heart in the US. But our friendship is still exactly the same. Either way, despite having Wednesday her Prince, it seems Markle definitely isn't about to start shying away from topics she's passionate about-which gives us even more reason to love her.