Furthermore, Sindhu's height advantage over such a short player like Akane at 1.56m is nullified by the latter's speed, incredible retrieving ability ,amazing court coverage, consistency in shotmaking, and, to add, attacking effectiveness especially after parrying the opponent's attacking shots (or when the opponent is visibly tired after a long, grueling rally).
As it is, WS nowadays is very competitive with intense rivalry among the top 5 to 10 players who are capable of beating each other on a good day, though atm AY appears to have a clear edge over the rest, from slight to significant depending on which player she's facing.
Still, how long such is situation is going to last is anybody's guess.