Skysports.com understands Yeovil Town and Swindon Town are among a host of clubs chasing Torquay United's on-loan striker Chris Zebroski.
Zebroski has impressed this season in the FA Cup and Blue Square Premier, notching up 11 goals so far.
His performances have alerted new Millwall boss Kenny Jackett, who is believed to be disappointed that he is unable to recall Zebroski from his season-long loan at Plainmoor.
The only option available to the South London club is to sell Zebroski in the January transfer window, as his contract expires at the end of the season.
Yeovil, Swindon Town, Doncaster and Bristol Rovers are all thought to be tracking the 21-year old, and all the clubs are believed to have had representatives watching recent matches.
"Chris is playing really well at the moment, so it is understandable League clubs are looking at him," Zebroski's agent Dean Sheehan of Definitive told skysports.com.
"He is enjoying the promotion push with Torquay, and their faith in him has been rewarded with some great goals and great performances."
Torquay are keen to hold on to the hit-man as they bid to win promotion to the Football League, but they know they could face a fight to keep him if Millwall receive offers for his services.