On Monday night, Chadli netted a 30-yard free kick to help earn the Baggies a point at the King Power Stadium, with the result leaving the club in 10th in the Premier League table.
However, ahead of the trip to Southampton, Chadli has called on the team to start to show more composure if they want to make further progress up the standings.
The 28-year-old is quoted by Reuters as saying: "We've got great players in the team so we need to show more composure on the ball, but I think we will do that next game, I'm very positive about that.
"It's a shame we didn't get the three points, but we need to take the good things we showed into the following games."
Chadli was making his first league start of the campaign after a muscle injury.