Orji Okwonkwo scored the first goal of the Thierry Henry era after Montreal Impact played to a 2-2 draw with Deportivo Saprissa in the Concacaf Champions League Round of 16 on Wednesday.
Arsenal's all-time top scorer and World Cup winner Henry became coach of Impact in November.
Okwonkwo gave the Canadian outfit the lead in the 12th minute after latching on to Bojan Krkic's rebounded effort before rifling a powerful shot which Saprissa goalkeeper Aaron Cruz had no chance of catching.
10 minutes later, Montreal doubled their lead thanks to Romell Quioto.