The former Man City boss has had a terrible start to his career at West Ham, after losing their first three Premier League games including a 4-0 thrashing away at Liverpool on the opening day.
Things seemed as if they were going from bad to worse for the 'Irons' when their opponent, two leagues below them, opened the scoring in the first minute from a corner.
It took until the second half before the Premier League outfit were able to get back in the game, and ended up scoring two more goals to confirm their place in the next round of the competition.
Speaking after the game, the Chilean coach's relief at winning was clear, even though the opposition play in League One and were down to 10 men for the majority of the game.
"We were obligated to win this game but when you are losing 1-0 it's not easy when you cannot score. I think we kept calm all game, we continued trying." Pellegrini said.
"It was important because when you continue losing, you need to win, the mind of the players, they need to continue trusting. We did our duty to eliminate Wimbledon but if we were the team eliminated it would have caused a lot of damage."
August 28, 2018