The centre-back is only 22 years old, but has made a very impressive start to the season in Serie A, despite making a mistake in their last match against Genoa.
A Danish internatiaonal at U-21 level, Andersen joined the Italian outfit for just £1.25m in 2017 from Twente in the Dutch league, and has gone on to make 17 league appearances including starting all 13 matches so far this campaign.
'Calcio Mercato' claim that both Man Utd and Tottenham are monitoring his progress and could make a move in January, with both team's not strengthening in that department during the summer.
The same source claims that it will cost one of the Premier League outfits around £25m, meaning Sampdoria will make a significant profit on their initial investment.