Newcastle and Everton have been courting Joao Pedro, while both those clubs and Crystal Palace have been sniffing around Senegalese international Sarr.
The pair helped the Hornets to a 2-1 comeback win over Middlesbrough on Tuesday night, with Pedro setting up Sarr for Watford's first goal midway through the first half after Rodrigo Muniz had headed Boro into an early lead.
Substitute Vakoun Bayo won it in stoppage time with Pedro also involved as Watford marked 100 years at Vicarage Road in style.
Edwards believes owner Gino Pozzo would resist any late bids but admitted nothing was certain.
Edwards said: "Time will tell and the last few weeks there has been a lot of interest, genuine interest as well. We will see how the next couple of days pan out but I am confident that by the end of the window we will be in a good place.
"They were great tonight and you could see their commitment to the club. They were celebrating in the changing room after as well.
"They are very good players and the goal really was sublime. We know they have got that in them.
"They performed well again tonight for everyone to see but whether that changes anything, I don't know.
"Everyone at the club knows they help but at the same time we have got to be realistic about where we are at, in the Championship.
"There is the human side as well, if someone has the opportunity to better themselves, and if there is a huge amount of money it is something you consider."