Ferrari technical director Pat Fry says the team are working to reduce the deficit to their rivals in qualifying.
McLaren managing director Jonathan Neale says the team are fighting on two fronts as they work to improve the performance of the MP4-28.
Marussia intend to build on their encouraging start to the season by introducing some new parts at the Chinese Grand Prix.
Williams will overhaul their FW35 at the fifth race of the year as they try to get their season back on track.
Paul di Resta says Force India are focused on trying to stay ahead of McLaren in the early stages of the 2013 season.
Romain Grosjean says he’s eager to get his hands on the exhaust upgrade that was run on his team mate’s car during the last race weekend.
Mercedes team principal Ross Brawn says they have begun the season more strongly than they expected to.