AFC Bournemouth have signed Christian Atsu from Chelsea on a season-long loan deal.
Midfielder Miguel Pallardo has signed a new one-year deal with newly-promoted Hearts while Danny Wilson leaves.
The 21-year-old Ivorian spent last season on loan with Bastia's Corsican rivals Ajaccio, scoring eight goals in 23 games.
Tallo is Claude Makelele's first signing since the former Chelsea, Real Madrid and France midfielder took over as coach of the club. Makelele led his squad in their first pre-season training session on Thursday.