re: Can somebody explain Goran Ivaniševic's 2nd serve strategy to me?

Did he do it every time?

If not, it’s just like Michael Chang’s strategy to occasionally throw in super slow first serves and weird spin serves that had raw speeds that you would see in a middle school tournament.

Mess with your opponent’s expectations and positioning. This could even be worth losing a point outright if it messes with their headspace

Also, Chang thought he was one of the world’s best returners with amazing lateral quickness. Goran thought he was the world’s best server. Both were probably right or close enough.

So they had a lot of confidence in their abilities when trying something unorthodox.