Chesterfield boss Paul Cook felt his side showed signs of completing a memorable Wembley comeback in the Johnstone’s Paint Trophy final.
Darren Ferguson’s much-fancied Peterborough United went ahead against the run of play through Josh McQuoid before Shaun Brisley doubled their lead.
The Spireites pulled a goal back through Eoin Doyle and peppered the League One side’s goal before Britt Assombalonga’s penalty sealed it.
Cook chose Doyle in attack over the likes of Marc Richards and Armand Gnanduillet and the Irishman rewarded his manager with a Wembley goal.
Cook said: “I thought Eoin’s was a good finish. I thought when we went to 2-1 we could really go on and win the game. I felt that strong that we were playing well.
“I thought we were vibrant, we know we’ve got good fitness levels and made substitutions that could have won us the game.
“When the sending off came we just stopped moving the ball quickly, we were not as penetrative as we wanted to be.
“Unfortunately for us Peterborough capitalised and attacked us quite well during that period and were very strong on break-aways.”
Peterborough United were reduced to ten men when Joe Newell kicked out off the ball at Sam Morsy midway through the second half.
More than 13,000 Spireites packed into Wembley to cheer their team on from beginning to end and Cook praised their support after the final whistle.
He added: “I’m disappointed for our fans today because we’ve travelled down from a small town. We’ve travelled in great numbers.
“We’re in a strong position in the league. We want to be in the automatic promotion places.
“We are also respectful there are other strong teams in League Two. If we had to come back to Wembley in the play-offs we’ll come back and enjoy the occasion.”