Dinesh Chandimal struggled to breathe properly in the morning session as smog engulfed Delhi.

Dinesh Chandimal struck his third successive fifty while bringing up the hundred up for the fifth-wicket partnership with Angelo Mathews.

The duo added 181 runs for the fifth wicket to stave off India's plans in the first two sessions of play.

Angelo Mathews hit his first Test hundred in two years, his eighth overall.

Ravichandran Ashwin picked up two wickets in two overs to help India gather lost ground.

Dinesh Chandimal struck his 10th Test hundred, his third against India to keep up Sri Lanka's resistance.

Mohammed Shami struck late in the day to help India close in towards bowling Sri Lanka out.