Brentford boss Uwe Rosler has urged his side to cut out the errors if they are to challenge for promotion this season.
Rosler was unhappy with both Walsall's goals in last Saturday's 2-2 draw and has called for a vast improvement when they host Colchester at Griffin Park this weekend.
"Unfortunately we are not stopping making errors," said Rosler.
"It will make it very hard for us to cement ourselves at the top in the future if we do not stop making errors like this.
"There is a lot of room for improvement."