Fikayo Tomori admitted AC Milan had suffered from stage fright after his team were left with a huge struggle to reach the Champions League Final following defeat by their city rivals.
Edin Dzeko scored the opener for Inter Milan and Henrikh Mkhitaryan – another Premier League old boy – put Inter two up in the 11th minute.
Milan had plenty of the ball after that but rarely threatened and Inter will be confident of progress in next week's second leg, when the majority of the fans will be behind them.
Milan looked hugely jittery during the opening exchanges and the former Chelsea defender said: 'We are disappointed with the way we started the game, conceding two early goals like that.