Barnsley have turned down a number of bids for striker Tom Bradshaw.
Bradshaw, who is entering the final year of his deal at Oakwell, is wanted by several Championship clubs following the Reds’ relegation last term.
Millwall are one of the second-tier outfits who have been knocked back by the Reds, with Neil Harris a big admirer of the striker.
The London club have reportedly tabled an offer of around £800,000 - matching their transfer record - for the sought-after striker.
Newly-promoted Rotherham United were linked with making a move for the frontman, who they missed out on when he went to the Reds, earlier in the window.
Barnsley signed the player for around £600,000 from Walsall two seasons ago ahead of their Championship return.
And the Welsh international has bagged 17 league goals since joining the ranks at Oakwell.
With the suitors circling for the 25-year-old hitman, the Reds will have to line up a suitable replacement.
The club have already turned down offers for Bradshaw’s strike partner Kieffer Moore with a number of clubs understood to be interested in the towering centre forward.
If both Bradshaw and Moore were to leave then Daniel Stendel would be left with just Mamadou Thiam, who scored just once in 31 appearances last season, and youngster Victor Adeboyejo who is yet to make his debut.
Meanwhile, Barnsley youngster Ben Williams has penned a new two-year deal at the club.
The 19-year-old defender’s new deal comes to an end in June 2020 and he is the second player to commit his future to the club this week after goalkeeper Jack Walton signed a three-year contract earlier this week.
Williams, who has been capped in the Welsh age groups, is hoping to force his way into Daniel Stendel’s plans this season.
He said: “I’m obviously over the moon.
“I spent last season working hard and hoping for a new contract and luckily it’s paid off.”
“I can’t wait for the new season to start now.
“I’m looking to get some game time with the first team this season after making the step up from the U23s.
“The tempo of the play is a lot faster, but I’m getting used to it and now I know I just need to impress the gaffer.”