West Ham United boss Avram Grant admits new defensive coach Wally Downes has had a positive effect.
Downes has won praise for his influence on recent results.
Grant told whufc.com: "He has done a good job. Normally I don't judge people after one week because you want to give them time, but Wally made a good impact.
"It's very important in English football to have coaches with specific roles and we will do that here, step by step.
"He has come as a defensive coach with a lot of energy and commitment and even in only one week I am very pleased with him."
