Manchester United boss José Mourinho spoke after the defeat against Feyenoord in the Europa League Matchday 1:
"The offside goal? It can happen, the referees do their best," he said to Sky Sports.
"We were unlucky because they scored in our best moment.
"We controlled the game, but we weren't able to score and they did it in the only counter-attack we conceded in the second half.
"Some players did better than other, but it's the way it goes. Some of them hadn't played so much until today and they were tired.
"Our rivals, instead, already played five games and were more fit."
Source: transfermarketweb.com