The 19-year-old ace has been thrust into the Spurs first-team since Tim Sherwood took over from Andre Villas-Boas, and has kept his place despite the presence of a number of big name and expensive alternatives.
His emergence has caught the eye of David Moyes, who is known to be looking to strengthen his squad during the off-season.
The Scot is desperate to add a dynamic and powerful player to his central midfield area, and is thought to see Bentaleb as a good option.
It is understood that scouts from United will be watching the teenager closely between now and the end of the season as a serious offer is considered.
Tottenham are thought to be keen to keep their man, but with Champions League qualification looking unlikely a big money bid may be too tempting to turn down.
Despite having made only a handful of senior appearances, Bentaleb is valued at well over £10m, and his price could rise further if he represents Algeria at the World Cup.