Arsenal manager Mikel Arteta believes his side have to be very wary of a buoyant West Ham this weekend when the two teams face off in north London on Saturday.
Arteta played for Hammers boss David Moyes for seven years during their time together at Everton, with the Spaniard now a manager in his own right at Arsenal having spent time as an assistant to Pep Guardiola at Manchester City.
West Ham head into the game on the back of just their second win in 2020 having beaten Southampton at London Stadium last weekend 3-1 thanks to goals from Jarrod Bowen, Sebastien Haller and Michail Antonio.
Arsenal meanwhile are bobbing along in tenth place but are unbeaten in their last five league matches under Arteta, though have been kncoekd out of the Europa League by Olympiakos.
The Hammers put in a stirring performance in defeat to Liverpool prior to their win over the Saints as they began to show some signs of life in their battle against the drop.

Speaking at his pre-match press conference at London Colney ahead of the game, Arteta said: "They [West Ham] caused a lot of problems for big teams.
"I worked with David for seven years and I know how structured he will be.
"I am sure he'll put a team out there that is going to make life very difficult for us. They will compete, they will be physical. We need to use our resources, play our game and then just think about performing. That performance will bring the points home."
And on his relationship with Moyes, the Spaniard said that his former boss was very supportive of him taking the job at Arsenal when he was approached to replace the axed Unai Emery.
"The thing I admire the most is how he treated people and builds a culture at the club. I spoke with him a few times. He’s always been really supportive.”
"He’s extremely demanding. Has that impulsive Scottish character. I spoke with him a few times before I took the Arsenal the job. He’s always been supportive."