Matija Nastasic admits swapping Fiorentina for Manchester City was a tough choice.

Nastasic joined City as part of a swap involving fellow defender Stefan Savic.

"It has all been very difficult," he told "But the whole team has tried to help me settle in, particularly Aleksandar Kolarov and Edin Dzeko.

"This season has not gone as expected, and I can't really explain why. However, we will not give up because there are still a lot of games to play."