Paris Saint-Germain head coach Mauricio Pochettino said he is disappointed his side missed out on the Ligue 1 title, while lamenting their hectic fixture schedule.
PSG won 2-0 at Brest on the final day of the Ligue 1 season on Sunday but leaders Lille secured the trophy with their 2-1 victory away to Angers.
The result ended PSG's run of three consecutive league titles, leaving former Tottenham boss Pochettino – who replaced Thomas Tuchel in January – "sad and disappointed".
Pochettino pointed to the fact PSG won both the Trophee des Champions and Coupe de France, while they also reached the Champions League semi-finals after eliminating Barcelona and holders Bayern Munich.
PSG played 57 matches across a lengthy campaign where they had little time to rest after reaching last season's Champions League final, which they lost to Bayern.
"I think it's important to put everything in context and to look at what happened in January," Pochettino said post-game. "We arrived and had no time to work, but we were welcomed really well by the club and the players.
"We were playing every three days and we made it to the semi-finals of the Champions League, beating Bayern Munich and Barcelona. We won the Trophee des Champions and the Coupe de Franc, which was important for the team.
"But Paris Saint-Germain will always be disappointed when finishing in second. We need to use the experience for the future of the club and of course to change things.
"It's important for the club to improve and we believe that we can get better. We are going to work hard for that to happen."
It is only the second time in the last nine seasons that PSG failed to win the title after 2016-17, when the French capital club were edged out by Monaco.
PSG finished the season with 82 points, their lowest tally over a complete season since 2011-12 (79, second place). It is only the second time a team have reached this total or better without being crowned champions after PSG, who totalled 87 points in 2016-17 when Monaco won the title.
Pochettino said PSG dropped too many points when they should not have in 2020-21.
"It is clear that during the whole season, not just from January, we lost points that we should have never lost in normal circumstances," he said.
"Today we won but we depended on a bad result from Lille in Angers. First of all I want to congratulate Lille because always when you win a championship it is well deserved, so the first thing I have to do is to congratulate them."
Kylian Mbappe became Ligue 1’s top goalscorer for a third consecutive season – the first player to achieve the feat since Jean-Pierre Papin (five between 1987-88 and 1991-92).
It is the 12th time a PSG player has finished as top scorer at the end of a campaign (Mbappe and Zlatan Ibrahimovic three times each, Carlos Bianchi, Pauleta and Edinson Cavani twice each), equalling the record currently held by Marseille.
Pochettino added: "Of course we are disappointed, we really believed that anything could happen in Angers, but it didn't happen. I think we were professional and we won. But in the end, it wasn't enough to win the title. We are disappointed and really sad."