Brendon Hartley has issued his first comments since his exit from Toro Rosso's Formula 1 team for 2019 was confirmed, saying he has "unfinished business" in the sport.

Toro Rosso announced on Monday that Alexander Albon would be joining the team next year alongside Daniil Kvyat, leaving Hartley without a seat after just one full season with the team.

Driver Ratings - Abu Dhabi GP

FEATURE: HOW F2'S UNDERRATED STAR OF 2018 GOT HIS F1 BREAK