No panic from Australia: Lyon

Nathan Lyon insists Australia are not panicking despite being rocked by a frantic - and potentially match-defining - conclusion to the opening day of their Qantas Tour of Bangladesh.

Hours after going past Richie Benaud's mark of 248 Test wickets, Lyon was hurriedly strapping on the pads to fulfill nightwatchman duties as the hosts claimed the prized scalps of opener David Warner and recalled first-drop Usman Khawaja.

Both with points to prove on the subcontinent, Warner was adjudged lbw to off-spinner Mehedi Hasan but spared by the by the Decision Review System before a carbon copy delivery - this one eluding the vice-captain's inside-edge - had him walking back to the rooms.

Four balls later, Khawaja set off for a risky single but was left scrambling after Matthew Renshaw judiciously sent him back and was caught short for one.

Such was the chaos, Lyon was still putting his batting gear on when he got told Khawaja was out and he was in. The off-spinner faced four more balls from left-arm spinner Shakib al Hasan before he too was trapped lbw.

It was the kind of nightmare collapse seen frequently on their 0-3 capitulation in Sri Lanka last year and their 0-2 series loss to Pakistan in the UAE on their previous trip to Asia, but also the type they'd largely avoided on their trip to India earlier this year.

Lyon was adamant the tourists weren't distressed by the turn of events, which soured a solid outing in the field to dismiss Bangladesh for 260.

"I wasn't panicking," Lyon told reporters after play. "I just missed a straight one. That’s the game of cricket.

"I wouldn't say panic is the word. Run outs aren't ideal in any form of cricket but especially Test matches.

"I didn't really see the run out so I don't know how bad it was.

"It's a game. We all make errors, I misjudged one and one hit me on the pad and went straight and got out lbw. It's just part of the game.

"The game is in the balance and we have an opportunity to come out in the morning and bat well, bat deep and bat well in partnerships."

Shakib, who may well have the best read on the prevailing conditions given he top-scored with an audacious 84 before turning destroyer with the ball, firmly believes Bangladesh had taken the ascendancy on the first day.

While a first-innings tally of 350-plus was touted after Mushfiqur Rahim won the toss and batted, Shakib believes Bangladesh's sub-300 total could prove well above par.

"It was quite challenging to bat out there," the allrounder said. "I think Tamim and I applied ourselves.

"It was an important partnership.

"We may be in the driving seat but we need to take seven more wickets.

"They have some batting left too, so we have to focus well. Every day gives you a new situation in Test cricket.

“It was turning from the start. We felt that it was going to be tough for them too. We wanted to get to 250, which we were able to do."

On a pitch that begun to misbehave as the day wore on, the 155-run stand between Shakib and Tamim was at times breathtaking.

Despite Pat Cummins singlehandedly reducing the home side to 3-10, the pair boldly hit back; Tamim with three sixes, all off Lyon and two from exquisitely timed strokes over the off-side, Shakib with a series of slashing cuts.

An impressed Lyon described their stroke-play as "incredible".

"I think the two guys batted very bravely," the 29-year-old said.

"They took the game on, which you have to do in these type of conditions.

"I'm going to sit here and give them credit.

"They're two good players, they played some incredible shots out there and took the game on.

"Hats off to them. It's now our opportunity to take the game on in our first innings and see where we get to."

Australia squad: Steve Smith (c), David Warner (vc), Ashton Agar, Jackson Bird, Hilton Cartwright, Pat Cummins, Peter Handscomb, Josh Hazlewood, Usman Khawaja, Nathan Lyon, Glenn Maxwell, Matthew Renshaw, Mitchell Swepson, Matthew Wade.

Bangladesh squad: Mushfiqur Rahim (c), Tamim Iqbal, Soumya Sarkar, Imrul Kayes, Shakib Al Hasan, Mehidy Hasan Miraz, Sabbir Rahman, Nasir Hossain, Liton Das, Taskin Ahmed, Shafiul Islam, Mustafizur Rahman, Taijul Islam, Mominul Haque.