Former Manchester United striker Dimitar Berbatov is alarmed by the lack of cutting edge at Old Trafford.
United have loaned Mason Greenwood to Getafe, and Jadon Sancho has now returned to Borussia Dortmund until the end of the season.
Of the fit and available players, Antony, Rasmus Hojlund, Marcus Rashford and Anthony Martial have all performed below expectations so far this campaign.
Their weakness in front of goal was evident in their 2-0 win against Wigan at the start of the week in the FA Cup, and they languish in eighth spot in the Premier League as Erik ten Hag’s second season proves to be a difficult one.
Speaking to Betfair, Berbatov is concerned by their profligacy.
He said: “They created a lot of chances against Wigan, they didn't take as many as they should have. I'm worried.
"There is enough proof from this season so far that if you don't take your chance then you will suffer. Everyone knows that.
“In the case of United, there needs to be more goals. It's a good win, but it shouldn't give them false confidence that they are ready to go against Tottenham.
"No, it's a completely different game. Everyone needs to be on their toes against Tottenham, completely concentrated and ready to fight for the three points.”