Diangana completed his move to the Hawthorns on the final day of the summer transfer window, but was missing from the squad that drew with the Lions in the Championship at the weekend.
Unfortunately for the winger, his bow for Slaven Bilic's men ended in a defeat. Fellow deadline day signing Charlie Austin broke the deadlock inside nine minutes, but Neil Harris' men scored either side of the break to book their place in round two.
The result was a disappointing one for the West Brom fans, but Diangana appeared to provide one of the few positives with his performance against their Championship rivals.
The 21-year-old looked dangerous throughout the 70 minutes that he spent on the pitch, and made a key contribution as his effort from the edge of the box led to Austin's goal as the goalkeeper could only parry the ball onto the bar, leaving the striker with the simple task of nodding it home on the goal line.
And plenty of supporters on social media have insisted that Bilic should keep Diangana in the starting lineup for Saturday's clash with Luton at Kenilworth Road as he was one of the players who can feel content with the impact that he made in the defeat.
Here is how some of the fans reacted to the West Ham loanee's debut display...
Austin looked decent but off the pace. Diangana has bags of flair and showed real intent. Pereira looked like he had class and was good on the ball but lacked options— Foxy (@Foxxxxy1) August 13, 2019
Diangana is very skilful and useful Austin looks very bright like his up for the challenge and he’s passionate I think he’ll come in clutch— AJ WBA (@Abdul_Jabaggie) August 13, 2019
Diangana just reminds me of Sessegnon— Matty (@iSwiftttt) August 13, 2019
#wba— Jak⚽️ (@jaksoi67) August 13, 2019
I thought Edwards and Diangana looked excellent in the first half, Furling solid. Austin did a few intelligent things. Semi and Townsend were ok.
Burke’s not the answer to any question, seems to always be a few metres from where we need him. Harper average,
Not all bad.
Diangana is a quality little player, we lost any threat of goal after Austin came off unsurprisingly— hannah ✨ (@Hannanar) August 13, 2019
Burke just isn't a footballer. Highlights tonight probably diangana and furlong. Both decent. Pereira you can tell has something about him. Krovinovic will be our best all season. #wba— Morany (@Bromayit) August 13, 2019
Diangana and Austin both need to play Saturday— james duffy (@barryd19651) August 13, 2019
and Pereira too
we missing Ahmed Hegazi bad
Well one less thing to worry about I suppose ... the positives are that Diangana (most likely spelt wrong) & Pereira look like v good signings and Austin is off the mark for the season. On to the next one... #WBA— hannah ✨ (@Hannanar) August 13, 2019
In terms of positives, Diangana showed flashes and Austin getting some minutes plus getting off the mark is important, but that’s about it— Ashley Burtoft (@AshBurty) August 13, 2019
Diagana was immense last night. First 30 minutes everything was through him. Good vision, good ball control, not afraid to take his man on or take a shot (his shot lead to Austin goal). Looks lively, tracks back as well and helps out in defenders. Once fully fit, he’s a starter.— Mike Baker (@shukokai_mike) August 14, 2019
Just back from #wba game. First 30mins we looked great then fell apart. Defence a mess at set pieces & we failed to create any clear cut chances going forward. Perreira & Diagana bright— Hashtag Trend (@IamTils) August 13, 2019
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