Arsenal have it all to do if they want to reach the Champions League final after Ousmane Dembele's early goal handed PSG a 1-0 victory at the Emirates Stadium.
More to follow...
- As it happened at the Emirates | Teams | Match stats
- Champions League semi-finals scores and fixtures
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What's next for Arsenal and PSG?
Arsenal travel to France for the return leg against PSG next Wednesday at the Parc des Princes.
But before that, the Gunners host Bournemouth in the Premier League's late afternoon kick-off on Saturday, live on Sky Sports, while PSG head to Strasbourg in Ligue 1 earlier on the same day.
The Champions League final takes place on Saturday May 31 at the Allianz Arena in Munich, with the winner of this semi-final tie taking on either Barcelona or Inter Milan.