Captain Mark Noble has been out of training with a back injury and remains a doubt.
Emery expressed his admiration for Wilshere and said the move was made in the best interests of his career, telling reporters: "I spoke with him for 15 minutes here in Colney before he left".
West Ham fans want their players to give maximum effort and to try to improve, and the Republic of Ireland worldwide will become very popular among the London Stadium faithful.
Like Arsenal, West Ham have failed to pick up a point from showdowns with Liverpool and Bournemouth. "Arsenal are playing in a different league with a different manager and different teammates". I think that Arsenal are going through the same thing.
A 3-2 defeat at Chelsea means Emery has returned no points from his first two Premier League games, and the clash at home to West Ham on Saturday will be eagerly anticipated by Gunners fans waiting for that elusive win.
"In the first we are playing with four at the back, then we have two and one, and one and two". Saturday is another match, tactically it is different.
Emery became the first Arsenal manager to lose his first two games in charge since Steve Burtenshaw after defeats to Manchester City and Chelsea.
The England worldwide spent 10 years with the Gunners and, although he has been hindered by injuries at times, Pellegrini says Wilshere can still reach the heights which once saw him earmarked as a potential superstar.
"This Premier League is a challenging league and it's not easy to play, but we're happy to be here and happy to take this challenge".
Arsenal will look to bounce back from a disappointing start to the new season when we welcome West Ham to the Emirates Stadium on Saturday afternoon.
And a game against West Ham, who are fraught with defensive frailties, could be the flawless starting point.
"Then we are going to play and we are going to think after that, for us to win".
"For me what's important is that all the players know how to [use] the ball in each match and that they use the [ball in] the best moment or the best way to attack against the opponents".