Barça coach , Ernesto Valverde 's style of play impacted Philippe Coutinho 's performance adversely .
In the 2018–19 season , his first full season with Barcelona , the standard of Coutinho 's performances distinctly fell , due to him being unsuited to play under the style of Barça coach , Ernesto Valverde , who operated him as a left wing within a front three in La Liga .
Philippe Coutinho