Top Australian batsman Steve Smith has revealed that he suffered a "bad dose of vertigo" ahead of the second one-dayer against India and was not sure of playing the game in which he struck a series-clinching hundred.

Smith's quick-fire 62-ball-100 propelled Australia to a mammoth 389 for four in the second ODI, which they defended easily to secure a decisive 2-0 lead in the ODI series on Sunday. However, the former skipper said he "didn't look great there for a while".