WTA players who have made coaching changes ahead of the new season:

Jelena Jankovic - Andrei Pavel
Ana Ivanovic - Antonio Van Grichen
Maria Sharapova - Thomas Hogstedt (co-coach)
Nadia Petrova - split from Vladimir Platenik
Lucie Safarova - Biljana Veselinovic
Laura Robson - Patrick Mouratoglou

ATP players who have have made coaching changes ahead of the new season:

Robin Soderling - Claudio Pistolesi
Thomaz Bellucci - Larri Passos
Kei Nishikori - Brad Gilbert and Dante Bottini