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Pellegrini revealed he was not surprised by how well he had been performing in recent weeks, after the 36-year-old scored a vital equaliser against former side Chelsea, a brace in the Capital One Cup against Sheffield Wednesday and a further goal in the win at Hull City to earn the club's player of the month award for September.
'For me it is maybe not a surprise because I know his quality,' he said.
'When you have the age of Frank Lampard you are not able to play three games in a week but when you have so great a player, you can resolve a lot of problems that we have during the game and I think that Frank is doing these duties at this moment. I am very happy with him.'
With Yaya Toure returning late to City from international duty, Lampard was thought to be in line to start against Tottenham Hotspur on Saturday lunchtime, but Pellegrini has since revealed that the Ivorian remains in contention.
The same cannot be said for centre-back Eliaquim Mangala, however, after the Frenchman picked up a thigh injury while on international duty.
'Tomorrow we will decide. Yaya arrived yesterday with Aleks Kolarov and Matija Nastasic,' he said.
'Other players arrived on Wednesday and others on Tuesday. All of them are in the squad list.
'We have just a small problem with Mangala who has a small muscle injury, but I think he will be fit without any problems for Tuesday.'
Pellegrini also spoke of his delight at the club's new £200 million training complex which the squad moved into this week, adding: 'I think it is the best facilities in the world. It is really very difficult to see another training ground as we have here in Man City.
'This has another dimension, it is really very impressive, we have all what you need to work in every sense. All the departments of the club improve and I am sure it is a very big step for this club to continue growing every day as they want.
'It will be different. We will see when we are going to use it. It is different to go to a hotel. We have all the facilities here. It is very important for the club to work all together from the first team to the youngest players, so a lot of things will improve.'
Elite Development Squad boss Patrick Vieira was just as enthusiastic, telling M.E.N. Sport earlier in the day: 'It is a dream come true for a player, fantastic. Everything is there for a player to challenge themselves.
“This facility has everything. Maybe at other places there are certain things you don’t have, but here you have everything.
'The quality of the pitches is unbelievable, and from the moment you come in, even if it early in the morning, there are people there to look after you until five or six pm.
'So you come in and do your preactivation, go to training, then lunch, then maybe a treatment. If you need a sleep, there is a place to sleep.'
The sleeping facilities look set be well used, with the Daily Mail reporting that City stars will become the first players in the Premier League to sleep at their own new training ground before games.
'I think it’s an advantage to stay,' Vieira again added.
'When I played in Italy we had a place to stay after training.
'Normally, after training you want to go straight home so you don’t end up stuck in traffic, but here you can stay and have a treatment, and leave much later. It is more professional.'
Elsewhere, James Milner has urged the club to build their squad around an English core.
The midfielder, who is set to extend his stay at the Etihad Stadium, is one of just two English Blues regulars along with goalkeeper Joe Hart, who is also set to pen an extension, with Gareth Barry, Micah Richards and Joleon Lescott all leaving over the summer.
'With any league in the world, the most successful clubs always seem to have a core of players from their own country,' he told the Sun.
'You look at the teams who have done well in the Premier League — most have had an English core.
'I think it’s important. If you are in Spain then I think you should have a Spanish core.
'If you’re playing away from home at Hull in January, it’s cold and wet — that’s different to playing in other countries.
'You need a good mix of home-grown players and the foreign lads and we’ve had that at City.'