Unai Emery: Top four difficult for Arsenal

Arnautovic played for Stoke before the Hammers

Arnautovic played for Stoke before the Hammers

Ozil has missed a number of games this season, with differing reasons given for his absence.

'Simply because he should have the opportunity to either play his way into form or get him on there and he'll play himself out of form so we can see exactly what is happening with Mesut Ozil.

As for Ozil's future, it remains to be seen how he will react to being left out again by the Spaniard, with fans undoubtedly uneasy at the situation given it appears nearly certain that Aaron Ramsey is on the way out. I think it is not one player (which means) we can't win or lose.

"We know we can't lose him".

Arsenal are still to receive credible interest for the player, who does not want to go on loan and whose £350,000-a-week salary deters potential buyers.

"I will continue to work with every player because they are all important but today the decision was to come with these players".

The Austria global has been heavily linked with a move to a Chinese club, with his brother also coming out to suggest the devastating attacker wants to leave the Hammers.

Arsenal old boy Samir Nasri made his first Premier League start for West Ham against his former club and nearly produced an assist in the first half when he showed great composure to hold the ball up and lay the it off to Felipe Anderson on the edge of the box.

"We will see what happens in the next few days and I hope he will take the best decision", Pellegrini said when asked if the former Stoke man had been waving goodbye.

Marko Arnautovic salutes the crowd as he is substituted against Arsenal (Yui Mok/PA).

"I have been in this position a lot of time in my 30 years, but I'm calm with nothing 100 per cent sure (regarding Arnautovic's future)".

Emery answered: "Yes but I can say he is working this week normally".

The Welshman, who started on the bench against the Hammers, is all set to join Juventus on a free transfer in the summer, with the Serie A giants having offered him a €7 million (£6m/$8m) per year contract.