Soungoutou Magassa struck an equaliser on 83 minutes to cancel out Diogo Dalot's goal also scored in the second-half.
Amorim lamented afterwards: "We should have closed the game with the ball because the game was there to win. We knew that we needed to defend the advantage far from our goal but the long ball, Bowen won the first touch and took it to the corner and tried to win the corner. They won the corner and we cannot suffer a goal.
"I think the overall performance was not perfect. We had our moments but we lost control in the game in some minutes in the first half and in the second half, especially after the goal. The game was clearly ours to win and we had an opportunity with Cunha to finish the game. "
On their missed chances, the manager said: "It is really frustrating because you look at the game, you have the game under control and we didn't win."
Heaven and Lisandro
Asked why Ayden Heaven came off at half time, Amorim explained: "Of course it was the yellow card and we tried to press high and leave one centre back with a striker all the time so any foul there could be a yellow. And we missed Ayden in the set pieces, so we need to be smarter when we play the game."
And on Lisandro Martinez: continuing his comeback, he added "The important thing is to win games. Of course we are really happy for Licha but we need to focus on winning games."