United, who have failed to get past the group stage only twice in 16 previous Champions League appearances, still need a point away to FC Basel to complete what is usually the formality of qualifying for the knockout stages.
A win for the hosts would send them through along with Benfica who have already made sure of taking one of the two places out of Group C.
Although unbeaten with nine points, one more than third-place Basel, Ferguson's side have only managed two wins in five matches, both of them against rank outsiders Otelul Galati of Romania.
"It is amazing when you are playing in front of a big crowd against players you know from the television and a club such a great tradition and name," said Basel striker Alexander Frei, who scored twice in that match.
"We are proud we got a 3-3 draw at Old Trafford and it will be important for the rest of our careers."
Frei, Switzerland's record scorer at international level, has scored 15 times in the last 16 matches and Basel have already amassed enough points to ensure they will top the Swiss league when it stops for the winter break.
Their 1-0 win at Aston Villa on Saturday was the seventh successive league match in which they have scored once, while the usually prolific Wayne Rooney has not scored in his last seven matches since converting two penalties against Otelul Galati in United's 2-0 win in Romania on October 18.
"We are having a bad time with injuries at the moment that's why we have a strong squad," said Ferguson, who is waiting on Rio Ferdinand's fitness after the central defender went off after 64 minutes against Villa.
