Arsenal legend Thierry Henry wasn't surprised by their shock Champions League defeat to AS Monaco.

Henry says he was aware of the threat posed by Monaco, but was amazed by Arsenal's limp showing against the Ligue 1 side.

"They can win 3-0 but it is going to be very difficult," he told Sky Sports.

"I knew this could happen, but not like it happened tonight.

"Monaco, at the end of the day, won easily."