The 19-year-old could be paired alongside Rashford for Saturday evening’s Premier League trip to St James’ Park to face Newcastle United with Martial now out for three matches following his dismissal against Tottenham Hotspur.
Cavani is currently completing his quarantine period since joining on deadline day, so much of the focus for goals will turn to Greenwood and Rashford.
Mason says the pair have been working hard in training on shooting drills, but he also insists there are goal threats throughout the team.
“We [me and Marcus] have worked on some extra finishing and I’ve worked all week on my shooting so I’m sure we’ll be able to get the job done,” he told club media.