The Red Devils signed Cavani on a free transfer on deadline day after his departure from French champions PSG at the end of last season.
Discussing Solskjaer’s move for Cavani, Martial told United Review: ‘He’s a really great player, he’s proved exactly that all the way through his career, and I hope that he’ll manage to help us out.
‘It’s always a positive to have even more quality within the group and as there are always a lot of fixtures to play, when one player is rested, it will allow us to ensure that there is no drop-off in quality whatsoever.
‘That’s especially important for the team.’
Martial has endured a frustrating season to date, missing Manchester United’s last two Premier League matches after being sent off during the 6-1 defeat to Tottenham for violent conduct.
He featured in last week’s impressive Champions League victory over PSG but scored an own goal in the 2-1 win.
Martial added: ‘These things happen.
But since it was my hometown club, I just wanted to give them a bit of a helping hand!
[Laughs] No, seriously, that kind of thing can happen to anybody, but the main thing was that we managed to score the winning goal right at the death, and that was more important to me.
‘They’d all told me that we were going to lose, and I’d told them that we wouldn’t. So when we went on to win I was overjoyed!’
Martial has also vowed to learn from his dismissal against Spurs and says he wants to show Manchester United fans the ‘real Anthony Martial’ in the coming weeks.
For sure, it really does you good, especially when you’re talking about big games like these in the Champions League,’ Martial said.
That red card [against Spurs] was my first ever and it’s something that I will learn from. But it will at least allow me to work even harder in training to come back even better.
I still haven’t scored yet this season. But I know that as and when I get off the mark with one, everything will be fine.
So, it’s down to me to keep putting in a big effort in training and to then show everybody the real Anthony Martial.