Nico Rosberg has had a cheeky dig at team-mate Lewis Hamilton after the double world champion turned 30 on Wed𝕴nesday.

Hamilton's Mercedes team had been encouraging Twitter users to send in their wishes on his birthday with the hashtag #HappyBirthdayLewis. Rosberg - who is six months younger than Hamilton - then sent his own tweet whicꦬh jokingly mocked Hamilton's age, saying "hopefully 💮it will be easier for me this year" ahead of the 2015 season.

- 30!! Have a great party! This day is good for me. You are old now, so hopefully it will be easier for me this year :-)-- Nico Rosberg (@nico_rosberg)

Rosberg and Hamilton had a difficult relationship as team-mates fighting for the drivers' championship last season, wᩚᩚᩚᩚᩚᩚ⁤⁤⁤⁤ᩚ⁤⁤⁤⁤ᩚ⁤⁤⁤⁤ᩚ𒀱ᩚᩚᩚhi𓄧ch culminated in the two colliding at Spa before Hamilton took the title at the last race of the season in Abu Dhabi.