Brighton are leading the race to sign Brentford striker Neal Maupay, Sky Sports News understands.
The clubs have been in talks for some time but the Seagulls are yet to meet the Bees' £20m valuation.
Aston Villa, Sheffield United and West Ham have also registered their interest in the Frenchman this summer.
But the Blades have signed Lys Mousset from Bournemouth and are working on a deal for Swansea's Oli McBurnie, while the Hammers splashed £40m on Sebastian Haller.
Maupay has not played a single pre-season game for Brentford, withdrawn from the squad due to concerns about his focus given the uncertainty surrounding his future.
With eight days still to go in the transfer window he is a doubt for the Bees' opening Championship game of the season against Birmingham this weekend.
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It's Transfer Deadline Day for the Premier League and Championship on Thursday August 8 and Sky Sports will be bringing you all the latest news on who your club is signing.
Start your day with Deadline Day Breakfast (6am) ahead of a special Good Morning Transfers show (9am), with Deadline Day - The Countdown (4pm) taking you to the 5pm deadline. The Transfer Show - Deadline Day at 6pm will analyse the big moves before Deadline Day at Ten rounds up all the transfer headlines.
As well as tuning into Sky Sports News, don't miss a thing with our dedicated Transfer Centre blog.