The 29-year-old has been subject of interest from the Egyptian giants after impressing the Red Devils hierarchy during their recent CAF Champions League encounters in March.
According to Cairo24, the Club of the Century have put aside a 40-million Egyptian Pounds (R47-m) to test Sundowns' resolve despite the club already issuing a hands-off warning.
Sirino is said to have been identified by manager Rene Weiler the ideal replacement for departing Huddersfield Town loanee Ramadan Sobhi but they won't be the only club keen on his services during the off-season.
Reports in Saudia Arabia suggest that the reigning league champions are also interested in the Uruguayan playmaker, with big-money signing Ahmed Musa set to leave in the coming months.
The Nigeria international has suffered from inconsistencies since his arrival from Leicester City and has failed to settle into life in the Middle East, with no goals scored in 17 games during the 2019/20 season.
Saudi.com claims Rui Vitoria's side have already enquired about Sirino's availability with his agent, Joao Bittencourt, who's previously admitted that Sirino may be allowed to leave the if any club matches The Brazilians valuation.
However, he cast doubt over a move to "Egypt and the Arab countries" as the "way of life" may not be suitable for the former Bolivar star.
Sirino has scored 11 goals and registered seven assists in 32 games across all competitions for Masandawana this season.