West Ham secured their first win of the season on Sunday afternoon, beating Everton 3-1 at Goodison Park.
Marco Silva's attack was misfiring while his defence simply could not handle Andriy Yarmolenko and Marko Arnautovic.
The Ukrainian winger - who was previously an Everton target - scored a first-half brace before Arnautovic added another in the 61st minute.
West Ham have been rooted to the bottom of the table but climbed up to 16th with an important victory.
But it wasn't a perfect afternoon for Manuel Pellegrini.
Former Arsenal forward Lucas Perez joined West Ham on a three-year deal this summer after failing to impress in north London.
The 30-year-old Spaniard is yet to make a Premier League start for West Ham and was named among the substitutes at Goodison Park.
Perez in hot water
According to the Sky Sports commentary team, Perez refused to warm-up after being beckoned by Pellegrini midway through the second half.
It's unclear why he refused - but the video (below) certainly doesn't reflect well on him.
Understandably, West Ham fans on social media were quickly calling for him to be binned.
Perez is contracted to the club until 2021.
In his post-match interview, Pellegrini insisted that Perez did not refuse to warm up.
“Maybe it looks [that way] and you can think he refuses," said the Chilean West Ham boss on Sky Sports.
“When Arnautovic was injured, I called him because he was making his warm-up, but when he was back sitting on the bench and Antonio was working I called him because he was ready.
“I don't have any problem with the player.”
Upon joining West Ham in August, Perez said that he was "very motivated" to play for such a historic club.
“I’m very happy to be here at such an historic Club,” he said, as per West Ham's official website. “I’m very excited, as West Ham are giving me the chance to stay in the Premier League and I’m very happy to be part of this new project.
“West Ham have great fans and play in an amazing stadium, so to sign here brings me great joy. I’m very motivated.”
Perez could be waiting a while to get his first Premier League start.