Arsenal has to do it all if they want to reach the Champions League final after Ousmane Dembele's early goal PSG had handed over a 1-0 win in the Emirates Stadium.
PSG made a sizzling start by Dembele before Saves from World Class of Gianluigi Donnarumma to deny Gabriel Martinelli and Leandro Trossard, the Gunners kept at a distance.
It was a frustrating night for Arsenal, who saw Mikel Merino's header excluded for offside, where the fans in the referee Slavko Vincic and express full-time, but it could have been worse for the North London side had PSG one of two clear opportunities in the final stages.
Mikel Arteta's side is now confronted with a tough task in next week's second stage in Paris, while they want to live to keep their dream of a first Champions League success in the history of the club.
PSG Show -Classe but tie not dead for Arsenal
Arteta asked the Arsenal fans to bring the noise, and they certainly did, but PSG silent the Emirates early. Dembele started the move and loaded before he chose Khvicha Kvaratskhelia, who easily passed Jurrien Timber past Jurrien Timber. The Georgian brought the ball back to Dembele and, in hectare space, he found the net through the inside of the distant pole to finish a 26-pass movement.
It was a nervy start of Arsenal and PSG did not need a second invitation to continue to put pressure on the home team. The visitors took full control of the game with Arsenal that struggled for each type of rhythm.
The opportunities kept coming for PSG as the frustration of Arsenal grew. David Raya had to be alert to keep the header of Marquinhos out before he made a super saving low to his right to deny the desire Doue. The rebound came to Fabian Ruiz, whose shot hit both posts with the ball that stayed outside, although the offside flag finally rose.
The side of Luis Enrique had difficulty keeping their ruthless pace up and it allowed Arsenal to get a foothold in the game. The header of Jakub Kiwior was easily saved by Donnarumma, but the Gunners started building some momentum.
The cross of Bukayo Saka avoided Martinelli just in the distant post before the Brazilian attacker was brilliantly refused by Donnarumma after he was played behind the PSG defense.
The Arsenal fans announced their feelings to the referee, and they were again frustrated by the officials when Merino's 'Equalizer' right after the break was excluded by VAR for offside.
The momentum of Arsenal, however, continued as Declan Rice flowed forward during a trademark run. He played Trossard on Doel, but the Belgian international was brilliantly denied by another gigantic hand of Donnarumma.
Arsenal used the slogan 'make it happen' before the game, but they could not find a way through a stubborn PSG defense.
In the end, the Gunners were lucky to keep the shortage on one, because replacement Bradley Barcola widely widened when he had a goal, while the late attempt by Goncalo Ramos Raya defeated but rattled by the bar in a huge disappointment for the Gunners.
What is the next step for Arsenal and PSG?
Arsenal will travel to France to France against PSG in the Parc des Princes this Wednesday.
But for that, the Gunners Bournemouth organized in the late afternoon kick -off of the Premier League on Saturday, live on Sky Sports, while PSG went to Strasbourg in Ligue 1 on the same day earlier.
The Champions League final takes place on Saturday 31 May in the Allianz Arena in Munich, with the winner of this semi-final draw against Barcelona or Inter Milan.