Chelsea were level at 1-1 going into the match at the Camp Nou but after two minutes and eight seconds, a mistake from Courtois saw Lionel Messi score from a tight angle through the legs of the Belgium worldwide.
"I think this question is for the coach of the national team, not for me", Conte said when asked for his thoughts.
It's hard as there are so many games this year and we have not got the deepest squad, maybe, and we have had new players this year.
Lionel Messi put a pair of shots through Courtois' legs, with Ousmane Dembele adding another goal as Barcelona cruised to a 3-0 win to advance to the quarterfinals 4-1 on aggregate. "We respect Barcelona, they have great players and are a big club... we want do a flawless job to go through to the next round".
Barcelona's director of institutional relations Guillermo Amor made no secret of the club's ambitions for the season when the Champions League last-eight draw was made in Nyon, Switzerland.
Speaking after the Barca loss, Alonso said: "It's fair that they go through, but we showed we are a good team and now we have eight games to fight for a spot and play this competition again next season".
"The first goal, I did not expect Lionel Messi to shoot from that angle and I was too late in closing my legs".
"He started to play with Barcelona and for sure he will finish his career in Barcelona".
Chelsea manager Antonio Conte said his side needed a ideal display to progress but they started disastrously at a packed Nou Camp when Luis Suarez teed up Messi, who squeezed a low strike through the legs of Courtois from a tight angle. The weakest point is between the legs for a goalkeeper.
"We were a little bit unlucky with the first two goals, we hit the post three times and had so many chances in both games".
"We deserved more, but against this team you can not concede and then miss chances", Alonso added.
"Now we have to face another competition and for this reason we must trust in our strength and try to move on". He stated: "It's annoying, but I don't think I have to hide, I have to come out, be a man, and say I made a mistake and move on".