City had to settle for a point after Enner Valencia twice put the Hammers ahead, only for two Aguero strikes to leave the sides deadlocked.
The result leaves the Blues three points behind leaders Leicester and although Pellegrini was frustrated at what he described as a “difficult” game, Aguero’s 14th and 15th goals of the season were reasons to be cheerful.
The Chilean said: “It was not what we wanted before the game. If you analyse the whole game we had two or three clear chances to score. We hit the post and had one clear chance at the end but it was a difficult game.
“Kun played very well. He scored two goals, he made the penalty and he had another shot that hit the post. He’s a player that is at 100 per cent now and I’m very pleased with his performance.”
The match was frantic, with 26 attempts on goal between the sides, an outcome that was always likely given the players on display according to Pellegrini.
“Both teams had attacking players,” reflected the boss. “West Ham have very difficult players so you must be very concentrated to try and stop them and with our team the same thing. That makes the game more open.
“We always try to play with creative and attacking players. It was important when we were losing 2-1 to put Kelechi on because he plays very well with Kun and that is what allowed us to score the second goal.”
Finally, Pellegrini bemoaned City’s fortune after Valencia’s second goal came during a period of City dominance.
He summarised: “I’m not very happy with the way we conceded the second goal. Fabian Delph hit the post and then it came in the next play. You need that bit of luck that I feel we didn’t have today.
“We knew that Antonio had a very long throw in so maybe we thought there wasn’t any danger because the ball was out but it was actually very dangerous.”
Take us to Wembley
In the big games, our fans can make a difference.
That will certainly be the case when Everton visit the Etihad Stadium for the second leg of the Capital One Cup semi- final on Wednesday 27 January, kick off 7.45pm.
It’s set to be a thrilling night of cup football and we’re hoping the roar of the City crowd can take us to Wembley and one step closer to a first piece of silverware this season.
Tickets are available to buy now priced from just £20 for Adults and £5 for Under 16s for supporters who meet the qualifying sales criteria.
Tickets are available to buy online at mcfc.co.uk/tickets, by telephone on
Click here for full ticket information.