Albion are awaiting the results of a scan on Solly March’s back injury after completing the £2.5 million sale of Will Buckley to Sunderland.
March has missed the Seagulls’ first two matches of the season.
The England under-21 prospect was due to start last Saturday’s opening home defeat by Sheffield Wednesday and remained sidelined for Tuesday’s Capital One Cup win against Cheltenham at the Amex.
March is the natural stand-in for Buckley on the right side of the attack until Albion sign a replacement but his availability for tomorrow’s trip to Birmingham and Tuesday’s visit to Leeds depends on his fitness.
Buckley has signed a three-year deal at the Stadium of Light, where he links back up with his old boss Gus Poyet.
He could make his debut for the Black Cats at West Brom tomorrow.
Buckley is the fourth player to leave Albion for the Premier League this year. Midfielder Liam Bridcutt also made the switch to Sunderland in January, while Leo Ulloa and Matt Upson moved to Leicester.
Their departures have raised around £14 million in transfer fees, although Buckley’s previous club Watford are entitled to a £275,000 sell-on cut.
The 24-year-old scored 19 goals in 109 appearances for the Seagulls. Chairman Tony Bloom said: “Will gave us some great moments during his time with the club and I would like to thank him for his efforts in his time with us and wish him well for the future.”