If Smith is ruled out, then the left-hand batter Travis Head will lead the squad as he is the vice-captain of the side.
Glenn Maxwell's hopes of reviving his Test career may be over after the all-rounder missed out on selection in Australia's much-changed squad for the Sri Lanka tour.
With 539 scalps in 134 matches at an average of 30.39 and best figures of 5/39, Lyon is the seventh-highest wicket-taker in Tests and has 24 five-wicket hauls and five ten-wicket hauls.
Chelsea climbed back into contention for next season's Champions League with a 1-0 home win over Everton in the Premier League on Saturday thanks to a fine first-half strike by Nicolas Jackson.
Australia, who have already secured their place in the final of the World Test Championship against South Africa, won the opening Test, also in Galle, by an innings and 242 runs.
Local hero Burn gave Newcastle a deserved lead in the 45th minute when the defender thumped in a header from a corner.
Flamboyant keeper-batter Ishan Kishan walked into the middle and he looked in the mood as he played some impressive shots, including pulling O'Neill for a six.
A round-up of Saturday's action in the English Premier League.
Liverpool's Diogo Jota bagged a last-gasp equaliser to salvage a breathless 2-2 Edraw against Fulham.
Australia's success has been compared with some of the nation's great Test teams led by Steve Waugh and Ricky Ponting.
Spin twins Matthew Kuhnemann and Nathan Lyon combined to dismantle Sri Lanka and bowl Australia to a crushing victory by an innings and 242 runs in the opening Test in Galle on Saturday.
Welbeck extra-time winner sends Brighton into quarters
She captures your attention with her effortless style.
A six-wicket haul from pacer Mukesh Kumar helped India A stay in the hunt during their first unofficial Test against Australia A at Mackay, Australia on Friday.
The fourth edition of the Red Sea International Film Festival saw Bollywood folk add a lot of glamour in Jeddah, Saudi Arabia.
Ryan Murphy lost the second of his Rio backstroke titles to Russian Evgeny Rylov at the 2020 Olympics on Friday and the US swimmer then suggested doping had played a part in his demise as events took an acrimonious turn at the Tokyo pool.
Arsenal, who had 23 shots to Newcastle's seven, piled on the pressure late on to try to reduce the deficit but Newcastle manned the barricades to take a healthy lead to St James' Park.
Murphy, ranked 48 in the world, became the first qualifier to win the tournament since Terry Griffiths in 1979.
A summary of Thursday's action in the Premier League.
Selectors will likely opt for another batter to cover for all-rounder Green in the India series and possibly an opener if Steve Smith is restored to the number four spot.
Here's what your favourite Hollywood celebrities have been up to.
Key players, such as pacer Mitchell Starc, are hitting form at the right time, while star batter Steve Smith is facing early setbacks in his preparations.
Tottenham Hotspur just beat the transfer window deadline to sign midfielder Danny Murphy from Charlton Athletic.
The outings of Abhimanyu Easwaran, Nitish Kumar Reddy and Prasidh Krishna will be the primary focal points of India A's four-day match against their Australian counterparts
The Hollywood actress will be put to rest after a private ceremony in Los Angeles on Christmas eve.
The bizarre event comes just five months after the death of his wife.
Manchester City thrashed West Ham United 4-1 in the Premier League on Saturday to claim their first back-to-back wins since October.
IMAGES from the Premier League matches played on Saturday.
Preity Zinta is in Cannes to present the Pierre Angenieux ExcelLens in Cinematography honour to veteran cinematographer Santosh Sivan.
IMAGES from the English Premier League matches played on Sunday
Images from Monday's swimming action at Paris La Defense Arena, Nanterre, France.
Stevens went through to his second World snooker final beating Ian McCulloch while Murphy scored over Peter Ebdon.
Hollywood actors Eddie Murphy and Shia LaBeouf are the new faces in the upcoming movie of the Batman comic series.
IMAGES from the English Premier League matches played on Wednesday.
Images from the Olympics swimming action at the La Defense Arena, Paris, on Saturday.
Three days to Sunday's 96th Academy Awards, and everyone has their predictions ready!
During his acceptance speech at the awards ceremony, Christopher Nolan remembered his 'dear friend' Heath Ledger, who had portrayed a negative role in his film, The Dark Knight.
Students and principals at the primary and senior schools Oscar winner Cillian Murphy attended in Cork, Ireland, tells Rediff.com what the triumph means to them.