West Brom have a huge match approaching against fellow strugglers Sheffield United on Saturday, with both sides still searching for their first win.
After Burnley picked up their first victory of the season on Monday, West Brom and Sheffield United are the only two teams without a win this season and sit 19th and 20th in the table respectively.
Therefore, the importance of this game cannot be overstated and Slaven Bilic must get his tactics right.
Against Manchester United he switched from a 5-3-2 to a 5-4-1, while he has used a 4-2-3-1 this season too.
Despite sitting bottom of the league, the Blades rank 13th in the league in terms of goals conceded, but have struggled to score, with only four goals so far this season. The Baggies have struggled at both ends, with the joint-worst defensive record in the league and scoring just six goals from their nine matches (via WhoScored).
Defensively, West Brom have shown some improvement with the five-at-the-back system and were able to run United and Tottenham Hotspur close in their last two games. But how do they unlock the Blades defence, without leaving things wide open at the back?
As usual, the key in attack is Matheus Pereira and he thrived in the 5-4-1 system against United. Playing slightly narrower than in the 4-2-3-1 system, he allowed Darnell Furlong to provide the width and drifted inside a lot more, subsequently looking more dangerous (via WhoScored).
Bilic could play Pereira as the number 10 in a 4-2-3-1 system, but that would mean restricting Conor Gallagher who has been outstanding in recent weeks. In order to accommodate Pereira and Gallagher, while also remaining defensively solid and maintaining some genuine width, the 5-4-1 is the best option.
With either Filip Krovinovic or Romaine Sawyers alongside Gallagher in the middle and Pereira and Grady Diangana given the freedom to drift inside and create, this system can be a winner for Bilic.
In other West Brom news, Chris Wilder has responded to links between West Brom and a Sheffield Utd player