Having contributed 21 goals in the Bundesliga and Champions League this season, Werner has emerged as a target for a number of clubs.
Chelsea have been heavily linked with an approach for the 23-year-old, who is said to have a release clause in his contract.
However, The Express claims that United are also now monitoring the situation after missing out on Erling Braut Haaland to Borussia Dortmund.
The versatility of the attacker seemingly fits the bill for manager Ole Gunnar Solskjaer ahead of the second half of the campaign.
Despite the offers that are expected to come his way, Werner may opt to see out the season at his current club. body check tags ::