The Colombia international scored his first Red Devils goal in a 2-1 win against Everton following his loan move to Old Trafford on a season-long loan from Monaco.
Meanwhile, 30-year-old striker Robin van Persie has scored two goals in six Premier League appearances after his return from injury.
And former United man Crerand is confident that Falcao and Van Persie can forge a deadly striker partnership over the course of the season.
“They’ve not played together for very long, so maybe as they play together a bit more they will get better and better together, and there will be a better understanding between the two of them,” Crerand told United’s website.
Crerand added: “Once they play a few games together I think that will come.
“Falcao’s come back from an injury and I think he’s a terrific player, I think he’s going to score a lot of goals for us.
“And if they can get an understanding between them, God knows how many goals they’ll score.”
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