Kohli was at his animated best on Sunday, taking some digs at Australia's batsmen as his bowlers delivered a series of bruising bouncers in the second Test at Perth Stadium.

The Indian skipper even spent some time trying to pump up the crowd as the on-field tension rose dramatically.

Kohli has already played a key role in the match, scoring 123 in the first innings.

And with Australia holding a lead of 175 runs with six wickets in hand, India will need Kohli to produce the goods in the second-innings' run chase as well.

Kohli produced a chatter-mouth hand signal on Sunday on reaching his century.

Indian paceman Jasprit Bumrah said even he didn't know what the signal meant, but he loved his captain's antics.

"He's always very animated with his celebrations. It's always very fun to watch when we're in the dressing room," Bumrah said.

Langer wasn't so impressed, giving a curt answer when asked on SEN about Kohli's antics.

"It is what it is. It's more white noise for us," Langer said.

Kohli was angry he was given out on Sunday, believing his edge might not have carried to Peter Handscomb at second slip.

Replays were inconclusive, with the umpires sticking to their original thinking that the ball had carried.

That incident might have played a part in Kohli being so animated in the field late in the day.

Australia are devising a plan to ensure Kohli doesn't post a big score in the second dig.

"I won't be giving too much away. We've still got two more Tests after this," Australian paceman Mitchell Starc said on Cricket 360 when asked about Kohli.

"I think it's just about staying patient. There's plenty of plays and misses over the time.

"He batted really well. He's one of the best in the world for that reason. He can sustain and absorb pressure and get away at times.

"For us, it's about being patient, building pressure ... keep doing damage at the other end and make him keep playing his shots. You can get him out."

Australian Associated Press