The 2017-18 domestic quadruple winners finished runners-up in the domestic cup (Coupe de France) and were knocked out in the last-16 of the Champions League and quarter-finals of the French League Cup.
"Paris Saint-Germain is pleased to announce Thomas Tuchel's contract extension for an additional season," the club said in a statement. "The German coach has now signed until 30 June 2021 with the French capital's club."
Tuchel, who coached German club Borussia Dortmund for two seasons before the switch to PSG, thanked the club's supporters and chairman Nasser Al-Khelaifi.
"This only reinforces my ambition to bring this team to the very top through hard work," Tuchel said. "I'm also very touched by the backing of our supporters, and I'm sure that the best is yet to come for our club."
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(Reporting by Rohith Nair in Bengaluru, editing by Pritha Sarkar)
