The Belgium international made his senior debut for the Pro League side in 2013 having risen through their youth ranks.
And last season he played a key role as they won the title and reached the quarter-finals of the Europa League.
Dendoncker’s value soared to £30m over the summer as top clubs from Europe’s elite league’s started sniffing round him.
And reports indicate United and City are interested in securing the 22-year-old’s services as they look to bolster their midfield ranks.
The Sun claim Jose Mourinho sent a scout to watch Dendoncker play for Anderlecht against Mechelen on Friday night.
Pep Guardiola, meanwhile, is said to have had officials from City in attendance to report on how well he performed too.
The Sun claim Dendoncker would fancy heading for the Etihad because of the prospect of linking up with countrymen Vincent Kompany and Kevin De Bruyne.
Although he could join fellow Belgian Marouane Fellaini at Old Trafford.
The anchorman is not just being tracked by United and City after making a name for himself in his homeland.
Atletico Madrid, AZ Alkmaar, Bayer Leverkusen, Borussia Dortmund, Heerenveen, Marseille and Rennes apparently had spies at the Mechelen clash as well.
Dendoncker, who joined Anderlecht aged 14, is under contract at the Parc Astrid until 2021.
However, he seems unlikely to see that deal out with so much interest in getting him on-board from elsewhere.
