West Ham grew into the game and had several more chances to increase their tally, Mark Noble threatening with a cross to the back post and, two minutes later, Issa Diop forcing a save from Jordan Pickford. He lasted a year at Real Sociedad and could not avoid Sunderland's Premier League relegation in 2016-17 before replacing Slaven Bilic at West Ham on a six-month contract in November.
Asked by Sky Sports why he made the switch, he said: "The project and the coach". "The midfield was great and then it's our job to score goals". I like to play like this way.
David Moyes thinks Marko Arnautovic was the difference between the sides after the Austrian's man-of-the-match display helped West Ham record their first Premier League win of the season at Everton on Sunday. "It's a tough result for us".
A long ball from the visitors took out the Everton defence and allowed Marko Arnautovic to slide the ball into the part of Yarmolenko to smash home from close range.
Everton pulled one back in first-half added time when Gylfi Sigurdsson scored from a header after Jonjoe Kenny lifted it into the mixer, but West Ham silenced Everton's comeback attempt when Arnautovic converted easily in the 61st minute for his third goal of the season.
And the away fans had a second goal to celebrate when Yarmolenko doubled the Hammers' lead in the 31st minute.
He made an immediate impact, guiding the ball into the net after Arnautovic controlled a hard pass before laying the ball across.