Despite the unending criticisms, Nigeria international Alex Iwobi was one, if not the best performer when Arsenal faced Chelsea at Stamford Bridge earlier in the season.

Iwobi who scored in the five-goal thriller in the reverse fixture is now ready again for another crucial test as the Gunners battle the Blues in Saturday's London derby.

Chelsea enter the weekend in fourth place and victory in north London would see them go nine points clear of Arsenal, currently fifth, in the race for Champions League qualification.

"This match for us is a risk and an opportunity," Chelsea Coach Maurizio Sarri said. "They're really a very good team. [In] the offensive phase they are one of the best teams in the Premier League.

"We can be dangerous against these opponents, but we have to stay on the match. We have to defend with a very high level of application and attention for 95 minutes."

Arsenal on their part were beaten at West Ham last weekend, with Mesut Ozil not included in the matchday squad at the London Stadium.

The German could be in line to return against the Blues, although Emery remained tight-lipped over Ozil's chances of a recall.

"I've spoken to him because I want consistency," he added. "He's had some injuries and these injuries mean that sometimes he is okay and sometimes he isn't okay. I want every player to give the same work everyday to be okay for every match. With Mesut it's the same.

"He didn't play the last matches but to me he's just like any other player. This Saturday he can be with us if he's okay. Now? He's training consistently with his work over the past two weeks and I think he can be."

With Manchester United already level on points with Arsenal, they cannot afford to drop points against the Blues.

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