The 25-year-old completed his move to the Reds on Thursday and trained with his new team-mates for the first time on Friday morning.
Martial feels Fernandes is already settling in well and believes his offensive qualities will be vital to the team.
“He’s a very, very good player. He had a great season last season and he’s started this season just the same and has been playing very well,” Martial told us.
“I think it’s a real big plus for the club and I think he’s someone who’s going to help us attain our objectives this season.