Mercedes
2014: Constructors' champions
Lewis Hamilton
2014: 11 wins, 16 podium finishes, 384 points
Drivers' champion
Nico Rosberg
2014: Five wins, 15 podium finishes, 317 points
Second in drivers' championship
Mercedes dominated 2014 and they are expected to do the same once more this year. They kept plenty up their sleeve in pre-season and their rivals are tipping them to be the ones to beat again.
Red Bull
2014: Second in constructors' championship
Daniel Ricciardo
2014: Three wins, eight podium finishes, 238 points
Third in drivers' championship
Daniil Kvyat
2014 (Toro Rosso): 0 wins, 0 podium finishes, eight points
15th in drivers' championship
Red Bull's post-Sebastian Vettel era begins with two highly rated drivers among their ranks. Ricciardo proved himself last year by outperforming Vettel, and Red Bull are among Mercedes' most likely threats.
Williams
2014: Third in constructors' championship
Felipe Massa
2014: 0 wins, three podium finishes, 134 points
Seventh in drivers' championship
Valtteri Bottas
2014: 0 wins, six podium finishes, 186 points
Fourth in drivers' championship
Williams are looking to build on a strong 2014, with Bottas particularly impressive with his six podium finishes. They are still chasing Mercedes, but expect them to once again have good moments in 2015.
Ferrari
2014: Fourth in constructors' championship
Sebastian Vettel
2014 (Red Bull): 0 wins, four podium finishes, 167 points
Fifth in drivers' championship
Kimi Raikkonen
2014: 0 wins, 0 podium finishes, 55 points
12th in drivers' championship
Need a much-improved season after a disappointing 2014, and the arrival of Vettel from Red Bull could provide the team with the boost they need. Pre-season testing suggests they are one of several teams competing for second behind Mercedes.
McLaren
2014: Fifth in constructors' championship
Fernando Alonso
2014 (Ferrari): 0 wins, two podium finishes, 161 points
Sixth in drivers' championship
Jenson Button
2014: 0 wins, one podium finish, 126 points
Eighth in drivers' championship
Kevin Magnussen (reserve driver, replacing Alonso in Australia)
2014: 0 wins, one podium finish, 55 points
11th in drivers' championship
Reunited with Honda, McLaren have two of Formula One's best drivers in Alonso and Button - although the Spaniard's season will start late due to a pre-season crash. Expect McLaren to find their best in the second half of the 2015 campaign.
Force India
2014: Sixth in constructors' championship
Sergio Perez
2014: 0 wins, one podium finish, 59 points
10th in drivers' championship
Nico Hulkenberg
2014: 0 wins, 0 podium finishes, 96 points
Ninth in drivers' championship
A disrupted pre-season marred by numerous delays means it is hard to tell exactly where Force India are at. The team's 2015 car proved reliable in limited testing in what was a good early sign, but they have work to do.
Toro Rosso
2014: Seventh in constructors' championship
Max Verstappen
Rookie season
Carlos Sainz Jr
Rookie season
Big things are expected of the 17-year-old Verstappen, who is being tipped as a future world champion. All eyes will be on the Dutch teen, but Toro Rosso believe both of their rookies are ready.
Lotus
2014: Eighth in constructors' championship
Romain Grosjean
2014: 0 wins, 0 podium finishes, eight points
14th in drivers' championship
Pastor Maldonado
2014: 0 wins, 0 podium finishes, two points
16th in drivers' championship
A Mercedes engine, and resolved financial issues, mean Lotus are expected to return to heights similar to the ones they reached in 2012 and 2013 - when they were fourth in the constructors' race.
Manor Marussia
2014: Ninth in constructors' championship
Will Stevens
2014: one start, 0 points
23rd in drivers' championship
Roberto Merhi
Rookie season
Manor Marussia appeared unlikely to be part of the 2015 season after coming close to folding in the off-season. A new backer means they will feature, but using their 2014 car that has been amended to comply with new regulations.
Sauber
2014: 10th in constructors' championship
Marcus Ericsson
2014 (Caterham): 0 points
19th in drivers' championship
Felipe Nasr
2014: Williams test driver
Giedo van der Garde
2014: Sauber test driver
It has been a messy start to 2015 for Sauber, with Van der Garde taking the team to court over one of the two seats. It remains to be seen who is actually driving in Melbourne for a team that was point-less last season.
Formula One: 2015 team-by-team guide
