Paris Saint-Germain president Nasser Al-Khelaifi has insisted the French side will be back in the mix for Champions League glory before long.
The trophy the French club pine for slipped from their grasp on Sunday as they were narrowly defeated 1-0 by Bayern Munich, with Kingsley Coman scoring a header in the second half.
Neymar and Kylian Mbappe both missed promising chances in the first half and the Brazil star was in tears after the final whistle was blow in Lisbon.
But Al-Khelaifi was proud of the PSG players and delivered a rallying cry in the face of defeat.
'We're sad. We don't forget that we've done great things this season. In the final, we lost 1-0 but we could have scored two or three goals,' Al-Khelaifi told RMC Sport.
'It was very close. I am very proud of my players, we had a great season, a great tournament here. We had everything we needed to win, but that's football.
'We will work to win next season. Tonight we believe in it more than before. I promise we're gonna win the Champions League.'
PSG completed a clean sweep of domestic honours in France this season and, while European silverware is the trophy they want the most, Al-Khelaifi said the squad still had plenty of achievements to savour.
'Players, honestly, everybody's coming out with their heads held high. They've created something.
'We played against the great Bayern, that's something. They're one of the best teams in the world. We lost 1-0. That's football. You have to improve on little things. This is our first final, Bayern's eleventh.
'We had a great season, we reached the final, we won four trophies. We're sad, we're disappointed, but there's a positive side.
'We'll get back one day, we'll work for it. It wasn't easy to reach the final, but we're going to do everything we can to win this trophy.'