West Ham United manager Sam Allardyce admits he is wary of the threat that Sergio Aguero could pose to his side at the weekend.
The Hammers host Manchester City in the Premier League on Saturday and Allardyce says his side are training hard to be able to limit the impact Aguero can have on the game.
The Argentine striker is one of the most feared attackers in England and scored four times in his last league game against Tottenham Hotspur.
It was a day where Aguero was on his very best form and Allardyce admits that, when he is putting in a display like that, there is very little opposition teams can do to stop him.
"Let's face it sometimes he's unplayable," he told West Ham's official website.
"He scored four last week and could have had five. We have to focus on limiting the service to him because he's so dangerous and can wriggle out of a tight situation."
Aguero's goalscoring exploits on Saturday moved him on to nine league goals for the season so far and West Ham appear to know all about his sensational ability.
If they can manage to stop him scoring, Allardyce will fancy his chances of pulling off a shock victory, with the east London side currently fourth in the table...
The Hammers have their very own in-form front-man in the shape of Diafra Sakho this season and they will be looking for him to continue hitting the back of the net.
The Frenchman has scored in each of his last six appearances in all competitions, as the London side have climbed into the top four.
It is a run of form which has raised expectations around Upton Park and the hope is that the side can build on the momentum gained from their fast start.