Following PSG's 2–1 victory over Rennes in the 2019 Trophée des Champions on 3 August, Verratti became the player with the most titles with the club, with 22 trophies in total (six Ligue 1 titles, four Coupe de France titles, five Coupe de la Ligue titles, and seven Trophée des Champions titles). In October, he signed a three–year contract extension with the club, which would tie him to PSG until June 2024. On 12 January 2020, Verratti made his 300th appearance for PSG in a 3–3 home draw against Monaco in Ligue 1. On 18 February, he became the club's all-time appearance holder in the Champions League, when he made his 58th appearance in the competition in a 2–1 away loss in the first leg of their round of 16 draw against Borussia Dortmund, overtaking the previous record holder Paul Le Guen at 57. In April, PSG were assigned the 2019–20 Ligue 1 title after the season was ended prematurely due to the outbreak of the COVID-19 pandemic; at the time of the League's suspension, PSG were in first place, with a twelve–point lead over second–placed Marseille. This was Verratti's record seventh Ligue 1 title with the club, which saw him equal the all–time individual record of most Ligue 1 title victories, along with his club teammate Thiago Silva, which was jointly held by Hervé Revelli and Jean-Michel Larqué of Saint-Étienne, as well as Grégory Coupet, Juninho and Sidney Govou of Lyon. PSG went on to win a domestic treble, but lost out in the Champions League final 1–0 to Bayern Munich on 23 August; Verratti made a substitute appearance during the match.