MANAMA, Bahrain - Heikki Kovalainen rejoins Caterham as a reserve driver and will take part in practice sessions ahead of the 2013 Bahrain Grand Prix.Kovalainen was dropped from Caterham in 2012 as the team opted for a new driver line-up consisting of Charles Pic and Giedo van der Garde.Caterham, who have yet to score a point in more than three years, have fallen behind rivals Marussia in performance during the first three races of the 2013 season.GETTING BACK BEHIND THE WHEELKovalainen said: "It's obviously great news that I'll be on track in Bahrain and Spain and I'm really looking forward to getting back to work and helping the team as much as I can."I'm physically ready to get back into the car and I know my experience can help give the team new ideas and options for directions to take on setup and strategy."Kovalainen has six years of F1 experience and is a former race winner whose technical insights will be invaluable for the struggling team.Team principal Cyril Abiteboul added: "He is perfectly placed to provide us objective feedback on the various types of configurations we will run and to give us an objective view of the 2013 tyres against his experience with the 2012 compounds."Having invested in Heikki for our first three years of competition it would be a waste not to leverage the valuable expertise he brings."Alexander Rossi remains the team's second reserve and will compete in the junior GP2 series.The team said "new opportunities" had arisen for China's Ma Qing Hua, who took part in during the first practice in his home grand prix in April 2013.The team added: "He remains a core member of Caterham F1 Team's driver roster and an announcement about his revised race plans in 2013 will be made in due course."