Sergio Aguero is not for sale, insists Manuel Pellegrini as Manchester City boss claims Chelsea aren't that far ahead

Manuel Pellegrini believes his side is not far behind champions Chelsea and has insisted Sergio Aguero is not for sale.

City is 11 points adrift of Jose Mourinho's men after a disappointing season which saw them relinquish their Premier League crown.

But the Chilean, speaking ahead of Sunday's trip to Swansea City, believes not much work is needed to bridge the gap.

Sergio Aguero was training this week as Manchester City prepared to face Swansea

(Left to right) Pablo Zabaleta, Martin Demichelis, Jesus Navas and David Silva stretch their legs at training 

The City squad prepare for trianing in the boot room prior to their training session on Friday 

Manchester City goalkeeper Joe Hart will be between the posts for the clash with Swansea on Sunday 

City midfielder Frank Lampard stretches out during the session in Manchester 

Aguero shoots towards goal as Manchester City manager Manuel Pellegrini (left) looks on

Pellegrini believes the gulf between his side and Chelsea is not big despite trailing them by 11 points

'I don't think we are very far from Chelsea.,' Pellegrini said. 'The games we played we did not see a better team but they were more consistent - that's why they won the title.'

Pellegrini also hailed Golden Boot winner-in-waiting Aguero and added that there was no chance the Argentine, who has scored 25 top-flight goals this season and who has been linked with Spanish giants Real Madrid and Barcelona, would leave City in the summer.

'I always say that Sergio is in the top five players in the world,' Pellegrini said. 'I think he improves a lot. We are not a selling team. I think Sergio is very happy here.'

Despite his scoring feats, Aguero was not chosen in the PFA team of the year and Pellegrini was at a loss to explain why.

'I don't know the way they chose the PFA team,' he said. 'I cannot talk about that. I think Kun must be in every best team.'

Hat-trick hero Aguero makes no mistake as he scores during City's 6-0 hammering of relegated Rangers

Pellegrini, who will be able to choose fit-again Vincent Kompany and Yaya Toure for the trip to south Wales, believes second-placed City's achilles heel has been their inability to see off the likes of Hull City, Burnley and QPR.

'We lost a lot of points against not small teams but three teams that are now in a relegation position,' he said. 'We lost nine points - there are a lot of things we must improve.'