Hey Asgeir, I would say it’s a bit of both, so trying to improve the spin on your serves is important but also being disguised and hard to read for the opponents. I think the main thing is having 3 or 4 serves you are confident with and can mix up the spin and placement on the table, this makes it hard for opponents as they always have to change their returns and they are not sure where its going. I would try to spend a bit of time each day, or 3 times a week at least to really focus on the serves as it’s very important.
Dan 🙂
