Radamel Falcao has conceded that AS Monaco "lacked a bit of intelligence" in the second half of Tuesday's Champions League last-16 first leg away to Manchester City.

Monaco led 2-1 and 3-2 in Manchester, but Man City scored three times in the final 19 minutes at the Etihad Stadium to claim a 5-3 advantage ahead of the second leg in Monaco last month.

Falcao, who scored twice as well as missing from the penalty spot, has admitted that "it was a great disappointment" to throw away an advantage in the latter stages of the contest.

"It was a great disappointment, but we did not know how to kill the game," he told reporters. "Maybe we lacked a bit of intelligence. Coming up against players like that, they are unforgiving. It is still open for the return leg – nothing is finished. We believe we can do better at home and win."

Former Manchester United and Chelsea striker Falcao has now scored 24 times in 29 appearances for Monaco this season.