Lionel Messi believes "good things are coming" after ending his first season at Paris Saint-Germain with a 5-0 win over Metz, as the Parisians celebrate Kylian Mbappe's decision to stay with the club.

But while highlighting his delight at helping the club to their 10th Ligue 1 title, Messi also recalled the "bitter taste" of March's Champions League elimination against Real Madrid, a tie in which he still believes PSG were the better team.

Messi recorded an assist as PSG rounded off their season by thrashing Metz, with the Argentine ending his first campaign at the club with 25 goal contributions in 34 appearances across all competitions (11 goals, 14 assists).

The 34-year-old's first season in France has not gone entirely to plan, however, with the Parisians squandering a two-goal lead in their 3-2 aggregate Champions League defeat to Los Blancos in March.

That collapse led to both Messi and Neymar being jeered by their own supporters in subsequent matches, while head coach Mauricio Pochettino has come under increasing pressure after his failure to deliver PSG their first European crown.

Nevertheless, a celebratory mood surrounded PSG after Saturday's announcement that Messi's strike partner Mbappe had agreed a three-year contract extension with the club.

The 23-year-old, who was heavily linked with a blockbuster move to Madrid, celebrated his new deal with a hat-trick that take him to 45 Ligue 1 goal contributions for the season (28 goals, 17 assists) – the highest tally across Europe's top five leagues this term.

Reflecting on a mixed first season in Paris, Messi expressed his belief that the club was on course for better things next term.

"The season is over, and I wanted to thank my teammates for how they treated me since I arrived and my family for always accompanying me and supporting me," Messi wrote on Instagram, alongside an image of him celebrating with team-mates Mbappe, Neymar, and Marco Verratti. 

"It was a different year because of everything that happened, but at the end of it all we achieved a league that I was very excited to achieve, because of what it means to be the first trophy here in Paris.

"We are left with the bitter taste of losing in the Champions League in a tie that we were being better [in], and at the same time, I want to be left with the joy of having added another title that was also one of the objectives.

"Surely good things are coming in 2022; it will be an important year, and we are going to fight to be competing with ambition for everything."