So, I got to know about them from the documentation. They are as follows:
Secret strikes :
to do a topspin strike with a side effect : press Normal Strike, then Short Strike, thenTopspin Strike (with default setting => B1, then B1+up, then B1+down)
to do a short slice : press Slice, then Dropshot, then Slice ( => B2, then B2+up, then B2)
to do a slow poor defensive slice : press Slice, then Defensice Lob, then Slice ( => B2, then B2+down, then B2)
I wanted to ask if it would be possible to map them as individual buttons, especially the topspin strike with a side effect. Also, it would be great if we had something like a deep top-spin strike. This would be extremely useful on clay courts to push the opponent back.