Lewis Dunk scored in his second successive game to halve the deficit at 2-1, but Virgil van Dijk’s two headers were enough for the hosts to claim all three points.
Arsenal began life without Unai Emery with a 2-2 draw away at Norwich City on Sunday. The Canaries twice took the lead in the contest through Teemu Pukki and Todd Cantwell, but this was cancelled out on both occasions by Pierre-Emerick Aubameyang.
Graham Potter confirmed that Bernardo is back and available for selection heading into Thursday's game, with Solly March and Jose Izquierdo the only two players ruled out.
In his pre-match press conference, the head coach said, "Bernardo is in the squad training. Everyone apart from Solly March and Jose Izquierdo is available.
"With a busy period coming up it's my job to pick the right combination for the team to win matches."
Thursday’s hosts are set to be without Dani Cabellos, while Hector Bellerin is also a doubt for the game.
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Our last fixture…
van Dijk (18,24)
Albion: Ryan, Montoya (Alzate 67), Webster, Dunk, Burn; Stephens, Mooy; Gross, Propper, Bissouma (Trossard 67); Connolly (Maupay 75).
Subs not used: Button (GK), Duffy, Murray, Schelotto.
Their last fixture…
Norwich City 2
Aubameyang (22 pen, 57)
Arsenal line-up: Leno; Chambers, Mustafi, Luiz, Kolasinac; Xhaka, Guendouzi; Aubameyang, Willock, Ozil; Lacazette.
Subs not used: Martinez (GK), Pepe, Tierney, Sokratis.
Arsenal’s player to watch…
Pierre-Emerick Aubameyang has proven to be the main man for goals this season, after netting 12 times in 17 appearances in all competitions.
The Gabonese striker netted a brace in the 2-2 draw away at Norwich last time out, in what was Freddie Ljunberg’s first caretaker match in charge.
He grabbed another double in a 2-2 draw at Watford back in September, and scored in the matches with Newcastle United, Burnley, Tottenham Hostpur, Aston Villa, Manchester United and Wolves.
The forward’s leadership qualities have also been recognised, and was named captain in the Wolves, Southampton and Norwich matches.