Nonetheless, Sindhu banished her blues to get one over her opponent and continue her impressive run at the Thailand Open.
There was no separating the two shuttlers in the opening phase of the game, but it was the Japanese ace who led 11-9 at the break, however, Sindhu's cross-court drops continued to trouble Yamaguchi who lost the first game 21-15.
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She made a valiant comeback in the next game and won an evenly fought battle 20-22, but in the third game, Sindhu proved to be too good for her opponent and sealed the win with a 21-13 third set victory.