According to the Times, Emma made annual trips to her mother's home city of Shenyang before the pandemic and would regularly train at the city's ping pong club.

Tian Fangzheng, head of the club, described Raducanu as an 'outstanding' player, adding: 'When all the other kids were tired, she was not.'

Tian told the Times Raducanu's mother mentioned her daughter was also 'quite a good' tennis player.

'You can tell she has the movements of playing tennis when playing ping pong,' he said. 'She picked up the sport very quickly and you can tell she's a sports person.' 

Raducanu has shared videos showing her impressive ping pong skills on her Instagram page."

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heavyspin wrote: What's with her index finger so high on the rubber? I'd like to see her transition to a backhand with that grip. Now on to golf. Why is she hitting an iron with the ball teed up so high?

Very good observation. I am sure you also know this is called the Hasegawa syndrome, named after the anomaly of penholder turned shakehand lobber & fastest looper, the 1967 World Men's Singles Champion Nobuhiko Hasegawa. 

       I have seen so many beginners have this Hasegawa syndrome or disease (Ian Marshall has also written an article on this on ITTF) . I saw this one player (a woman like Emma)  being coached by a 2200 player. The coach would hit just to her forehand and she was pretty good and can rally like 20 to 30 balls in a row with Hasegawa grip (index finger right up the backhand in the middle) . But when she switched to her backhand she can also hit 20 to 30 in a row but she had switched to extreme opposite of forehand Hasegawa grip, with thumb right up the middle.  The coach never did an alternating one backhand & one forehand test. If he had, this disease would haven been easily identified & cured early.   

  Hasegawa was amazing during his time (despite this limitation, (just like short pips pro players like Hou Yingchao or Wang Yang being so good DESPITE their “honorary looper” submission) with this grip but I am not sure if he will be any good today 

     I personally had this Hasegawa disease on my backhand for first 10 to 15 years or so, when I was programmed & brainwashed into believing that I should only use spinny inverted both sides because that is the normal and right thing & socially acceptable thing to do, despite my being a natural chopper. I switched my grip to have my thumb up the middle when I played backhand with thick inverted sponge. But when I switched to long pips on backhands especially OX, there was no longer a need for this because when I loop on my forehand with spinny rubber the racket is somewhat to a lot closed but on backhand I do not have to cock my wrist to close my racket on the backhand because with OX pips , the racket can stay open (same as closed on my forehand). During very fast rallys this becomes very important even though I am away from the table chopper but if you are a close to the table blocker this is even more important.

    Needless to say, the first thing a coach has to do is to identify a player's natural grip whether penhold or shakehand or American or whatever and then also as in this case correct or adjust the grip itself (unless of course advanced players maybe using more than one grip or hybrid grips)  

Anyhayhoo, Emma Raducanu is obviously so talented she can easily learn to use proper grip & adjust & play both backhand & forehand properly in no time. In fact she probably has great reflexes and so fast she probably can even get away with even switching back and forth between index finger up the middle for forehand & thumb up the middle for backhand (at amateur TT level unless she can to pull a Fred Perry) 

 Interestingly I also noticed that she is not what I call a “backhand buffoon”, a term I use for basement ping-pong players (clueless about table-tennis as a sport), especially in countries of North America where she was born (but moved to UK very young), where they take a natural backhand stance though table-tennis is a "mostly" forehand dominant racket sport

      As far as Emma's USATT rating, it is hard to say without looking at her backhand or watching her play against many tournament players but right now I am sure it will be pretty low. But if she trained I won’t be surprised if she breaks 2300 or even 2600 in USATT rating as her feel for the ball is crazy incredible & given her talent and that may be much higher than golfer Fredrick Jacobsen or Borg (Bjorn that is may be not Rune) or Vilas or Toni Kukoc etc. 

    As far as your question about golf I don’t have a clue as I am just a former semi-pro level super-speed golf (aka field-hockey) player