A buoyant Felipe Massa believes Williams Martini Racing is in considerably better shape ahead of the 2015 F1 season and feels it is still improving.

Williams enjoyed a welcome return to form in 2014, finishing third in the constructors' championship, while Massa - who switched to the team after eight seasons with Ferrari - achieved three podiums on the way to seventh in the overall standings.

It is a revival that looks set to continue into 2015 with Williams generally regarded as second-only to Mercedes in terms of form heading into the Australian Grand Prix. Indeed, despite its strong 2014, Massa is convinced the team is much better ahead of 2015.

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"[The team is] 100 per cent [better]... even 120 per cent! I think it is a different team to one year ago, but even to when it completed 2014. I really hope that this team can fight and give everything in the best way, every race, every moment. I hope we can show that.

"The team is still growing and working to improve. We are working to get the best out f the strategy, the mechanics, pit stops, the drivers, the evolution... we are still not as big as other teams but we are in a position to fight.

Though Massa is resigned to the fact Williams cannot challenge Mercedes at this time, he is certain the team is capable of winning races in m2015.

"This is another big fight we are going to have all season, but I think we are ready to fight [for wins]. We don't know if Mercedes are really far away or not, but we are ready to fight with the others. I hope we can take the best out of the car every moment we are on the track."