Harry Kane and Erling Braut Haaland reportedly remain as long-term transfer targets for Manchester United.
Despite the regular contributions of many of their attacking players, United have lacked a sustained impact from a number nine this season.
Anthony Martial has scored just six goals from 27 outings in the Premier League and Champions League, far below what is expected of the France international.
According to The Mirror, United are contemplating whether to replace the 25-year-old with either Kane or Haaland.
Given his importance to Tottenham Hotspur and indifferent relationship between the clubs, it will take a bid in excess of £150m to take Kane to Old Trafford.
United are more likely to move for the younger Haaland, who could leave Borussia Dortmund this summer if clubs are prepared to pay higher than the figure set out in his 2022 release clause.