Manchester United squandered a brilliant opportunity to win the first leg of the Europa League Last 16 and enter the San Siro encounter with an advantage.Amad Diallos strike looked to have earned a victory for United but Simon Kjaer popped up with an injury-time equaliser to spoil their opponents fun.The visitors dominated the first half at Old Trafford as Franck Ke sies fine effort was ruled out for handball by the VAR.Ole Gunnar Solskjaer introduced Diallo in place of Anthony Martial at half time and the Willie Cauley-Stein Jersey Ivorian footballer made an immediate impact for the home side.The 18-year-old winger put his side ahead with a brilliant header from Bruno Fernandes chipped pa s in the 50th minute of the game.The Red Devils could have extended their lead if Dan James had not mi sed a brilliant scoring opportunity. And that mi s proved costly for them as Milan struck in injury time with Kjaer heading Rade Krunics corner past the goalkeeper Jordan Poole Jersey .The two European sides will now meet each other on March 18 at the San Siro Stadium for the second leg.