Australia's David Warner is at risk of missing the rest of the Border-Gavaskar Trophy series after suffering a double blow.

Warner was on Saturday ruled out of the ongoing second Test against India in Delhi with concussion, with Matthew Renshaw taking his place.

The veteran batter was later revealed to have sustained a fractured elbow.

Both issues arose during the first day of play on Friday, when Warner made 15 from a 44-ball knock in which he was struck on the elbow and helmet.

The latter blow left the 36-year-old with concussion, while the first inflicted a hairline fracture to his left elbow.

Warner did not return for fielding duties on day one and was ruled out on day two.

He is a major doubt for the third Test, which begins in Indore on March 1.

Australia made 263 in their first innings at the Arun Jaitley Stadium.